Trump never said they should be kicked out. He implied that maybe america isn't for them. Big difference.
Agree completely, Trump’s implication (to me ) was, if it is so onerous that you have to protest while on the foot ball field, perhaps you should look for a country with fewer problems.
Part of the problem is that they have issues which need to be resolved in the minority communities. The reason they want to protest at a game is because the audience is much bigger. What is needed is a well funded TV studio where they can create videos that they want people to see and a system where these videos are distributed. The issue with the first amendment is that they have the right to have their say, but they don’t understand that people don’t have an obligation to watch them.
The fundamental concern should be protested where the community is aware of it, and no one would mind if they used there rather powerful influence in that manner.