It's what I want to think, so...

I'd say more Harry than Snape, because honestly what did he expect Snape to do? Say right in front of Umbridge 'oh, yeah I get you *wink wink* I'll take car of it'? Obviously Snape would have to pretend he didn't get it. There was nothing else Snape could do. Also, instead of trusting Kreacher, since he was illegally using floo anyway it makes no sense Harry didn't floo right into Sirius' house and call out rather than just sticking his head in and trusting kreacher. If he'd just flood the whole way everything would have been fine, so his hero complex mixed with him not thinking to properly check is why I'd say him, even though I do think his fear was understandable.

Also, lets not forget the blame to be placed on Molly Weasley. If she didn't insist on treating Harry like a child and keeping him out of the loop when Sirius wanted to tell him everything he would have known exactly what Voldemort was up to and probably wouldn't have fallen for that trick. She knew what Harry would eventually have to do, so there was no way to protect him from his fate, yet she still insisted on trying to coddle him and all it did was hold him back. I'd say she was more responsible than Harry or Snape. Snape was being a good spy, Harry at least had the excuse of being concerned and out of the loop, she was just meddlesome and that meddling got Sirius killed. I'm not saying I don't understand her concern (though in cases like this it annoyed me like hell) but she took it too far without thinking it through. You can't hold back info from the one who needs it most like that, it's stupid.

Honestly, the only two people responsible for Sirius' death are Voldemort and Bellatrix. Harry was just a victim, like Sirius was. Voldemort was getting into his head, one of the many weapons he used to control him, and at that point he wasn't able to handle it... It was still a fairly recent thing, so there wasn't much he could do. Obviously he freaked out. I mean, a few months before the same thing had happened to Mr. Weasly and it had turned out to be true. Voldemort controlled the ability he had to get into Harry's mind and viceversa to his advantage, and we all know he is one of the most powerful wizards ever. So it obviously wasn't Harry's fault.

As for Snape, he was just trying not to be obvious in front of Umbridge. He had an important image to keep, and in the long term it would have been a pretty big problem if he let it show that he was somehow on the Order's side.

So yeah, I think Voldemort and Bellatrix (obviously) are the only ones to blame for that.

Ok, HOW can you blame these people for Sirius' death? If anyone, obviously BELLATRIX AND VOLDEMORT, as Priscilita22 says. Bellatrix is the one who KILLED HIM after all, and all of these people that are being blamed didn't know what they were doing, and neither would we if we were in that situation. This just happened, and we have no one to blame besides the Dark Lord and Bella.

Overall, I totally agree with Priscilita22

You don't need to know the results of your actions to be faulted for them. If that was so nobody but psychics would ever be in the wrong. Just because Harry and Mrs Weasley (since I feel Snape did nohing wrong I wouldn't include him) didn't know it would result in a death doesn't mean they can't be partly blamed. Regardless of their intentions they did silly things that led to a death so that death is partly their fault. That doesn't mean they should be hated or punished for it, but it does mean it is in part their fault, because if they had thought things through properly and not made the mistakes they did Sirius wouldn't have died.

Drunk drivers don't mean to kill people, but they still do. Are they blame free because they had no bad intent? Voldemort and Bella are the only ones who should be held accountable, and what Harry and Molly did is understandable in both cases but if your mistakes lead to a death that wouldn't have happened if you had thought more then you are in part responsible for that death, even if you had good intentions. They aren't bad guys and shouldn't be punished or disliked for it, but it's not exactly unreasonable to feel they are in part responsible for not thinking their actions through.

I've always thought this. Once again, Hermione is the one in the right but stupid dumb Harry just does things without thinking resulting in someone's death. If he listened to Hermione, Sirius wouldnt be dead.. therefore he is responsible. Obviously others are responsible like Voldemort and Bellatrix but thats only because of Harry.. Harry should've listened to his best friend. Yes, I do understand that he was scared and shocked that his godfather might die (or be dead) but he was putting other peoples lives at danger all because he thinks he's the only one who's right.

Sorry but that's just the way I feel and no one's gonna change my opinion. Oh and it sounded better in my head by the way lol

god,how could you blame this two people???obviously bella and voldmort

^ well obviously! thats just stating the obvious. but if it wasnt for Harry then Sirius would still be alive sooo yeah. Voldemort tried to get Harry to the Ministry but Harry has a mind of his own (Also Hermione told him that it was a trick but did he listen? Nope because as usual, he's the only one who's right) and Bellatrix isnt really responsible either. Yeah she did kill him BUT she only killed him because of Harry. If Harry didn't go to the Ministry then Bella wouldnt have killed Sirius.

sorry but its just the way i feel

to tell the truth it's Dumbledore if Snape hadn't listened and went to the ministry he'd joined the death eaters yeah but he'd be able to get to harry since he was with him and Bellatrix hates snape so she'd gone after snape and not Sirius simple

the are slightly to blame, but they didn't kill siruis they just were victims. and kreacher had a small part as well

But mostly Bella, obv. :P

well the was Bella some kill him

BELLA IT IS ALL YOUR FAULT I HATE YOU

i think it was bellatrix's fult, but shes still my faveirote

IT WAS BELLATRIX!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

It's Bellatrix fault of course!

Sirius is a grown man. He made his own decisions knowing full well what the consequences could be. If it was anyone's fault other than his, it was Bellatrix.. because she did, you know, kill him.

I say Bellatrix.

Listen to Dumbledore! It was Kreacher's fault. And a little bit Sirius'. I adore Sirius, so I hate to think that but it's true.

Bellatrix

Come to think of it I actually dont think it's Bella's fault, it's Rowling's after all she's the author she could've choosen to keep him alive but she didn't.

Dumbledore's, Voldemort's, Sirius' and Bellatrix's.

Blaming it on Harry?????? Seriously??? It was no one's fault (excluding who actually killed him). Harry acted on the visions (which he thought were true like with Arthur) and he went to save Sirius. I would've done the same...you're panicked and the first thing is to go.Maybe Harry should've listened to Hermione but he was the one getting the visions which were true last time so of course he wanted to act upon them. Saying "Harry should've listened to Hermione and Sirius would be alive" is utterly ridiculous cause Sirius could've died the same night for other different reasons resulting from other different choices. It is NEVER one's fault. It's multiple decisions of multiple people and besides Sirius could've fought and be ok so it really shouldn't be the blame on Harry or Snape.