Given their acting ambitions and it's role models, why would it be such a surprise that they might have something against Christians? Liberals hate politically incorrect Christians and don't hide it. Liberal Christians are the most hateful and intolerant of all.
If they have something against Christians it's probably a certain culture of Christians, remember they are going to a Christain Collage or lets say a Christian Collage by name. I doubt if these kids are very much up on Christian spiritual stuff. Probably deep down in there soul you probably could find they do have something against true Christians, whether they would recognize it them self.
Not to apply that the people who went to those Churches were true or false Christians, they just so happen to go to the Churches that were in these teenagers path.
People at their college have been quoted as saying they were Satanist.