They are kids. Kids are dumb sometimes. Let them be edgy as long as they grow out of it.

Plenty of people do way worse, like using slurs as comedy constantly. The issue was publicly displaying this edgyness, as it can become a dog whistle for actual racists and then it is no longer just kids messing around.

I say it was insensitive, but I understand why they thought it was funny; I hope they can learn from this and earn their respect back by being more sensitive in the future.