Kaeperernick should continue to protest by sitting during the national anthem until all black people are respected and until the police brutality and killings of black people ends. His peaceful protest is powerful and effective. It is an example of the kinds of freedoms that soldiers fight for us to be able to have.
Colin Kaepernick has every right to kneel during the national anthem, that is what people who fight are actually protecting, that right not the flag itself. It is important for people who have a national stage to make a statement when they can, as that is how the word about injustice spreads most quickly.
I don't know if Colin Kaepernick's protest has been or will be very effective, but if he wants to keep doing it and he believes in his cause, he should keep doing it. Now that he's started doing it, if he stops, it will be seen as him giving up or, in effect, admitting that the problem no longer exists.
He should be able to exercise his freedoms and wether or not we agree with it we can't say he can't do it. He is living his own life and making his own choices. You can call him names and do whatever you like but he is simply acting on his freedoms.
I believe that wether Kaepernick chooses to stand up for the Anthem at this point doesn't even matter. Should he stand, yes, but our country provides us the freedom to make those choices. Him choosing to continue his protest will only gain momentum if he continues to get the media spotlight. If his intentions are true in why he is sitting then he can find a better avenue of voicing those concerns, but sitting down for the Anthem just makes him looks disrespectful and ignorant, considering that the flag stands for nothing but the freedom that even gives him the right to sit down. However, by both idolizing him and slandering him in the media, he is given attention and fame and therefore feels validated in his decisions. By cutting out media coverage of his choices, he would either need to find a more productive way of voicing his opinions or we would find that the lack of attention only shows that he was doing it more for fame than for true beliefs.