Trump supporters feel threatened. They even feel that their race is threatened. Along comes Trump and says it's going to be his way or no way. He shows no respect and says and does anything he wants. He appeals to the down and out, the less fortunate and bigoted white. He's fighting to re-educate everyone that most media is "fake news" so that come 2020 time you will sway more his way and not believe what anybody else says. Those that believe him are feeling empowered already and they report, lie, call police, and even kill others because of this empowerment. Trump allows them to act just as he does and get away with it. He is the model that made this all a reality for them and you cannot talk about him or remotely threaten him in any way. Most talks about anything Trump does come back to you with remarks about Hillary or Obama and they are not even in power. Trump is POTUS and even his empowered supporters don't know what to say about him. The most they do is lie just like he does and they see no harm in it and think it is all good.

I see no problem with your joke and it is called free speech. Your joke is no different that the re-manufactured joke of people in an airplane without enough parachutes and Trump the "stable genius" jumps out of the plane with a school boys backpack.