tl;dc version:
Football player Colin Kaepernick sat during the national anthem in a pre-season game out of protest, and sparked rage and said he would continue to do so until there was some change with injustice and police brutality.
Other NFL players have been following suit by kneeling, sitting and or raising their fists and talking about said issues openly and freely.
Depending who you ask (I am not touching this though/same as why Pretty said she wouldn't either) It is either disrespectful to the flag and hard working men and women, or he's using his constitutional right to not stand during the anthem as president Obama had said.
Also the latest protests/whatever you want to call them happened to be on the 15th anniversary of the 9/11 attacks and every NFL game had a pre-game ceremony in some fashion to remember those attacks as well as any other memorials/ remembrance events that happened across the USA/world. So some got very upset and this is Kate's take on it as per what she thinks of them kneeling instead of standing as is customary.
Disclaimer: Limer did not say which way he feels about said issue and will not comment on it other then just giving background information. This is one subject even I won't touch just help to fill in the holes.