I swear I remember Tim doing a whole 'I won't judge him for what his father did' thing at one point
Well, if he did, it sure wasn't in his own book (or Teen Titans either, because I marathon read the entire v3 recently). In fact, in Robin #152, his own words were: "If I can't beat the hell out of his Dad, Junior would be the next best thing." Granted, the animosity cooled down after they worked together in the next issue, but after promising not to try and turn Nightwing against Boomy, he refused to even shake hands. "Civil is one thing, but you'll forgive me if I'm not ready for the other stuff yet."
Btw, does Owen know that it was Robin's father that his Dad killed?
Over it? No way. Not after Red Robin #1 last month Huh? I thought it was a sign that he was way over his Dad's death to be able to take Bruce's name for himself like that.