Perhaps Jesse Jackson should remember that the First Amendment refers to the government making laws against the free exercise of speech. Private entities, such as a professional football team, can restrict or fine speech and behavior by their employees. Hence, the NFL's Take The Knee moment does not apply, notwithstanding President Trump's blue collar blurtation about "Sons of Bitches" who do not respect the flag or the National Anthem.
Despite "Rev." Jackson's assertion that the Take The Knee protest is not about race, he uses a Cotton Picking analogy, which would be a micro-aggression if it was uttered by someone else.
Jackson's suggestion again demonstrates that he is more inclined to organize political factions than organizing a church much less evangelizing the Gospel.