Only Kaepernick and God knows for sure. I was heavy into football watched every game I could during the time he started to kneel. When this first happened everyone in my work all believe he didn't mean to sit out the anthem. He is just stupid and totally forgot to stand. He had to make something up in order to not sound like a moron to the world. If you are going to protest why would you just sit on the bench? It's because it was never a protest or statement. It was just him being a complete idiot.

Check this link out to read more about his first time sitting out the anthem. https://www.sbnation.com/2016/9/11/12869726/colin-kaepernick-national-anthem-protest-seahawks-brandon-marshall-nfl

Aug. 14 and Aug. 20 — Kaepernick goes unnoticed while sitting during the anthem is exactly what happened. He fucking sat there and forgot to stand.