In my opinion, their desire to not attend the National Anthem is every bit as much about "free speech" as it is Trump's prerogative to call them "SOB's" among other things. Do I like how Trump exercises his "free speech"? Absolutely not - on several accounts - but that doesn't mean he isn't entitled to express it. Same goes for the NFL players - it's freedom of speech - and whether or not any of us 'agree' with their actions, they are free to do it.