If I'm having a good-faith discussion with someone, yes, I expect someone to change their opinion at the end of the discussion, or at least learn something.
That's what it looks like from outside the discussion, and I don't understand the point.
It's a troll move for sure, especially if it's against someone specifically for their ideology or party rather than specific policy. Looking back, I think that has offended me more than anything you've specifically said to anyone personally. I think I took your general view (seemingly looking down on those who disagree with you, it comes across pretty arrogant) as offensive and as attacks. Yes I understand the irony in me saying that.
Looking back on your posts, you are right, you never insult anyone directly, but you are insulting to groups of people (once again, usually the groups who disagree with you).
I can't speak for Greg or Kerry. I usually agree with Kerry politically but he's such an offensive person to me that I have placed him on 'ignore' here on CR so I don't see his posts. Once again, I feel that engaging with him is ignorant and pointless. He adds nothing to any discussion that I've seen. Your posts at least have clarity and intelligence, he gets emotional and goes off on tangents. I've engaged him in the past for the same thing. I believe he is incapable of learning. And yes, he absolutely is a troll for using the tactics he uses.