I'm not going to repeat exactly what he wrote. But for the record- a few months back my wife went through some very personal issues and I started a thread here seeking advice from others who have gone through the same thing. (I received very helpful advice, and kind words, for which I will always be grateful, BTW.)
Apparently the poster in question read through that thread, though he didn't post in it at the time. But at a later date, in the midst of a political discussion, he chose to insult me and then wrote, "No wonder your wife is a xxxxxx". It was completely out of left field, and I took it (I think correctly) as a terrible insult. I responded, understandably I trust, rudely enough, that he was a worthless poster who provided nothing of value to this forum (which I still stand by.) He then tried to back track by claiming he was trying to be "helpful" to my family, which is an excuse that apparently, sadly, a few people have bought into here (or perhaps they're just trolling, I don't know.)
That was the end of the exchange from my end. I did not report him; I don't report anyone. I don't try to get anyone banned.