There is very definitely politics in the decision to visit the person who politicized this event. tRump politicized this even by uninviting people to his house. That was classless and crass. Then he further politicized things by opining on the fine young men who exercise their constitutional rights during the Anthem.

To go to the White House after all this is to demonstrate support for the person in the White House currently. It is not an act without symbolic significance.