I think it would have been better for Daniel to come out and say 'you guys know Jason is and always has been a /bad guy/, right? Right?'.
Eh...that sort of statement would only work if Daniel assumed his particular view of morality, and what is good and evil (and what those terms mean), is the only correct one, which is something most people wouldn't be arrogant enough to do. It's all a matter of interpretation and opinion. I don't consider a boy who is outraged to see a rapist get off (especially after driving his victim to suicide) to be evil, and while I think killing that man is an evil act I don't think that means the boy is evil. I also don't think Jason was 'just' a thug looking for an excuse, I think he is a man who spent much of his early life watching people victimize and destroy one another without meeting adequate punishment, and who turned the sense of frustration and anger that resulted outward. His antisocial behavior is a relatively understandable reaction. Why respect a system that often fails to protect the innocent and only temporarily inconveniences criminals with incarceration in paper prisons? In real life I'd say he's completely in the wrong, but in the DCU the reality of the situation is that most criminals won't stay in prison long, and they'll soon be back to threaten the populace with death rays and fear toxins. I'm willing to relax and/or adjust my own views of what is and isn't wrong for this fictional world that operates with a different set of rules and expectations.
What is less subjective is the fact that Daniel's Jason has seemingly abandoned any sense of morality and values that Winick and earlier writers had given him. Even if you feel he is a bad guy it should be acknowledged that he had limits, as arbitrary as they may occasionally be. There was never an adequate reason given for his sudden rejection of those limits in Battle for the Cowl. I don't think it makes much sense for someone who once stated that kids are off limits to start shooting ten year olds in the chest, and I'm more tempted to say that's just bad writing than anything.
So, with all opinions being equal, I can say without bias or prejudice that I'm right and you're wrong. Nyah!