Actually, Tony Daniel did admit in an interview that he made Jason black-and-white EvilTM on purpose because he didn't like that many readers had agreed with Jason's shades-of-grey attitude and he wanted to discredit it.
IGN Comics: Anytime you work with an anti-hero character I think you always run the chance that some fans will embrace his or her willingness to go the extra mile and actually kill. When I was talking to Judd Winick about his initial run resurrecting Jason, he mentioned he was a bit surprised at fans' willingness to get behind Jason. By pushing him further towards the side of villainy than ever before, were you purposefully trying to make it clear that Jason is not a good guy and is in fact off his rocker?
Daniel: Yes. At this point he is beyond the point of no return in terms of ever being considered even remotely a hero. What I wanted to do here is put him in a place that he can't come back from. The things that he does here in Battle for the Cowl are things that can never really be forgiven. The only outcome would have to be imprisonment or something worse. But from this point on for Jason the gray area between good and bad has disappeared. It's crystal clear now that he is on the dark side.
Truly, nothing says "good writing" like purposefully derailing a character and making him Rape The Dog in a blatantly OOC manner to shove anvilicious morals down the readers' throat.