I think the difference between Trump and Chappelle is , if we watch Dave's stand up for years he has mocked himself for being stupid to leave a hit show and not being famous enough. (His story where his son meets Kevin Hart and he gets shown up is an example). Trump never does do this or even be a working class man who climbed for years to become an overnight success as he became etc. In essance...Chappelle seems to be human in his stand up. Donald Trump has never had this and appears as a spoiled rich man...repeatedly.
Also in looking its not just right wingers and usual audience applauding Dave for this. A number of liberal people and posts on Youtube and FB have seemed to back Chappelle due to his comedy. Its one of those great divide issues in a way. There isn't an outcry to cancel netflix as we saw with some things they have done (one show in particular last year had many cancelling netflix) beyond some pushing virtual walkouts and demanding netflix remove Chappelle.