Let's just review the whole thing:
His first response to you making an ugly personal attack was totally cool (I think even you'd agree). Then you responded with an outlandish claim. He was less-generous in his response to that (he first accused you of making a mistake in going for "balance," then accused you of actively trying to deceive, though he also threw you a back-handed compliment). Then you clearly strawmanned his point. He didn't respond to that, but picked up with a response to your response to Quipling, somewhat harshly attacking your repeated false accusation. Then you got kind of snippy with him. Then he accused you of stubbornness (refusing to either defend your attack or admit that it was bullshit). Then you insisted that you have been polite to him and he's been an asshole to you. Then he called you out on starting with slander (true claim, IMO) and refusing to own it. Then you said you were putting him on ignore.
The fundamental issue, as I see it, is that you really believe the nuttiness about Clinton being a criminal. People who follow this stuff more closely get annoyed seeing political discussions polluting with that kind of batshit crazy claim, especially when it's not just the TCK/Inga types making it. Whereas I think you really believe it and think that people who say they don't are just refusing to acknowledge the truth out of bias. I'd argue that your thinking on the issue inevitably makes it a personal issue.
There was a recent thread where
@sub_thug was doing the same thing (in his mind, anyone not buying the "liberal media" CT must be partisan). If you find yourself thinking that the only reason someone can possibly disagree with you is some kind of personal flaw, you should consider that you're not being reasonable.