I haven't seen actual examples of things he posted, but there's a difference between making jokes that are offensive and poor taste, and making jokes that degrade entire groups of people.
If you look at South Park's history of their take on transgender issues, a lot of people would be really offended. It's changed recently but South Park's historical take on transgender issues was "No have babies, not a real woman". There is no 'Right not to be offended'. You do not have the right not to be exposed to views that are different from your own. There is a difference between making offensive jokes, and making jokes that reveal a real belief that entire groups of people are terrorists and apes.
The idea that people are censoring themselves online because they're afraid ten years from now there will be political trends that judge them horribly is a scary one. Majoritarianism is a form of totalitarianism.