There is more to this story than was reported. Breitbart carries a video showing it was the drummer who marched over to the Catholic school boys and beat the drum next to the MAGA hat wearing kid. Those accompanying the drummer sound like they were the ones taunting the kids.
Cartoonist Scott Adams (Dilbert) originally berated the high school kids, until he viewed the video. He's apologized and blamed CNN as a purveyor of fake news (sound familiar).