Would tu not like someone simply because your friend(s) didn’t like them?

No. I like MM even though my friend hates him.

No.

No. I try to have a reason for not liking someone.

I've been in situations like this before, even on this site..... Of course my friend's opinion would sway mine a bit and conversation may be a bit awkward, but I couldn't dislike someone just because a friend of mine does.

yes if he is really wrong

Maybe, it depends on the person, whether he/she is good o bad

No