I'm going to continue to make a joke at my friend's expense
Why are you going to do that?
It's not a really a joke. I have serious issues with him, but I deal with it by making fun of him.
I don't think you should keep making jokes about your friend. It does more harm than good in the long run. Perhaps you just need to sit down with him and discuss your issues.
Cool! Maybe we can figure out who's sometimes being close minded and only getting parts of the whole picture.
I'm glad to hear you say that. It sounds like you're on the right track to achieving a healthier, more positive relationship with your friend.