He hates Biden. He hates Democrats. He hates his wife by default, therefore he attacks her. But why? Let's say I agree that she shouldn't use the "Dr" honorific. Who cares what I think? Why would I use my bully pulpit to denigrate her so profoundly. What would be wrong with me?
You can lead a horse to water. But you can't make him get down on one knee and do an Al Jolson impression!