This is what he does. He asks for details from you of whatever is being discussed, then he finds fault with those details and claims his experience/knowledge is superior to yours. He's not a seeker of truth, he's a troll who feeds on arguments and disputes.
His latest tactic (on race) is blaming the victim. He talks about the crime and current difficulties of black folks while completely ignoring 4 centuries of the black experience in the US. He demands solutions yet offers none of his own except the hackneyed ones we've all heard from racists for years.
When he is advised to pay attention to what blacks are saying all over the media - especially in these critical days when so much proof of excessive police violence against blacks is shown constantly on video - he ignores the advice and refuses to enter a dialogue and just returns to his worn comments that serve on one.
It's amazing that towns that are predominantly white have white protestors marching for the first time. But he just ignores that. Not for him to be part of the solution. He prefers the 1950s when segregation was the rule and blacks "knew their place".
Even in Europe, they're protesting. Germany, London, Italy, and all the way from Australia to Brazil to Africa and the Middle East.
Now he will post the usual nasties when he is called on the carpet. Most of us are used to them by now.