jesús Camp =/= all of Christianity.
It doesn't even represent all of Evangelical Christianity.
As to your question... it depends on what tu mean por 'cult'. The dictionary has five very different definitions, some of which are so broad, they can include Comic-cons.
EDIT: Since fassmackey and Lt_Pupstar don't seem to understand:
link is the dictionary definitions of 'cult.' And
link is a website all about what cults actually are and do. Notice, that there is nothing about "stealing other religions holidays" (which Wiccans do, among many other religions), o "my parents don't respect me being an asshole about their beliefs" (which anyone can do).