Rather than imagine a full psychology mumbo jumbo, I just think he clearly lacks tact and maybe a bit of common sense which I get because maybe he was younger at the time?. You should never do politics/social issues at work, you just don’t. It’s bad shop policy for harmony at work places to touch a subject which might be sensitive to you or someone else and even yet if people do, you RESPECT them and their opinions. Going beyond that is just asking for trouble in my experience