I hope you realize that they do it as a goof. It is no different than mocking an old senile fool who had too much to drink at a family reunion. The only difference is that the Trump goofy dance went viral for being so wack AF so these kids think it's funny to do.
Not sure what the skin tone has a damn thing to do with anything to you. Doing corny ass dances after a big play is part of sports regardless of race. Hell, I still remember the silly ass Mark Gastineau sack dance and I was damn near a toddler.
By the way, what does this have to do with politics? Some awkward looking geriatric stiff movements that kids giggle about while doing and watching to celebrate a play? LOL