At the end of the day he's a scumbag and deserves to be in jail.
Again, being a scumbag is not a crime - hence one doesn't deserve to be in jail for being a scumbag.
And yes, there are legal grounds to put him in jail since he did violate his probation terms (both using an alias and using the internet). In fact, like posted earlier, it appears he's used two aliases not only one.
I don't know what the conditions of his parole were, so I can't comment on that. As I said, if he violated his parole, he should be dealt with like any other parolee. The "movie" and hiss scumbagginess are irrelevant when it comes down to it. If he had made a wonderful film, that everyone agreed was a masterpiece and had true artistic value, I'd still argue that it's irrelevant when it comes to a parole violation.
It's funny how so many people are questioning the legalities of putting him in jail whereas when it comes to guantanemo bay inmates the majority here post that they should be locked up without questioning legalities.
I'm not questioning the legality of putting him in jail. I'm stating that he should not be jailed because of the "movie" in question, because making offensive movies isn't illegal, offending people isn't illegal, mocking religious figures isn't illegal and being an asshole and a scumbag isn't illegal.