Well, the President has free speech rights too. He sends soldiers out every day to defend this country under the flag of the United States, or under the National Anthem, and the unity that those symbols call on us to adhere to. So I agree that it's a big mistake to protest in that fashion, because it weakens the commitment we have to this nation that has provided us this freedom.
I would note, of course, that the players aren't subject to any prosecution. But if they take a provocative act, they can expect to be condemned, and the President has the right to condemn them. And I would condemn their actions, not them as a human being. But there are many ways these players, with all the assets that they have, can express their political views other than, in effect, denigrating the symbols of our nation.
A nation that's provided our freedom to speak and act.