That's a football team. This is a country with rule of law.
There is precendence for deportation and the stripping of US citizenship. There are laws against going outside this country and speaking against it. They haven't been used in a while for sure, but they could be. John Kerry should have been arrested and deported for meeting with parties in France that were negotiating for Peace with the US in the 70's. Jane Fonda should have been arrested. Jesse Jackson and Calypso Louie should have been arrested for going to the ME to meet with enemies.