In my experience, in casual forums, most discourse from people that involves explicitly voicing support for Trump in a general sense also follows the attitude y

In my experience, in casual forums, most discourse from people that involves explicitly voicing support for Trump in a general sense also follows the attitude you're describing. It's near-universally accompanied by very strong expressions of hatred for one of a few named groups. And of course such behavior naturally provokes the same attitude to be returned. In that sense, it makes sense to ban it outright.