verbatim from a comment I posted to a news website...which I'm happy to say has received overwhelmingly positive response.
His protest has to do with equal rights in the USA, as professed in the US constitution, and that that ideal does not seem to be the case (and never has been, but it's an imperfect world populated by imperfect humans, the ideal is worthy and someday maybe it will be achieved).
Trouble is, particularly since 9/11 everything to do with the US flag gets turned into a military/police/anyone in uniform (firefighters) thing - blurring the actual point of his protest - and an affront to them, somehow, if someone like Kaepernick exercises his freedom of speech/action to take a dissenting view.
He's completely within his rights to express his views in the manner he chooses, as are those who oppose his views to express theirs. As for this notion that he could not protest as he is were it not for the sacrifices of those in the military or other uniforms who fought for 'our' freedom and way of life, er, what?
I won't go into major detail (I could but in the interests of brevity) but name me a war - and I accept being corrected - since World War II where the freedom or way of life of the USA (or the western world for that matter) was threatened. Seriously. I can't think of one.
More often than not the US/the West has caused its own problems/engendered blowback by interfering in the internal affairs of sovereign countries - however different 'their' values might be than 'ours' but they are 'their' values and whether 'we' agree with them or not it's not up to 'us' to interfere and change them. Then 'we' blame 'them' for whatever chaos ensues.
In summary: 1. Kaepernick is completely within his rights to do what he wants. 2. the rest of it is all to do with the concept of 'the other' as viewed through the narrow prism of some 'Western' eyes who apparently live by the conceit that 'we' are better than 'them'.