Where do you come up with is stuff?
Keapernick works for a private organization and has no right to do anything other than what his employer allows him to. And people express their "preferences" with laws in legal ways? This president and the left have cheer leaded while blatantly and unconstitutionally disregarding the laws you speak of. If Obama was not black and the republicans (who're a joke) weren't laying supine for the executive branch he'd have been impeached long ago, and if the country had a sack likely tried and convicted of treason.
The Bill Of Rights is not something that gets to be tinkered with or reinterpreted by each proceeding generation that might feel triggered by something in it. Hell, half these spineless fascists would just as soon eliminate the First Amendment as well. The BOR's IS the Constitution, period...