I actually don’t think kids are more accepting of other people than adults. Kids and especially teenagers are not accepting if you’re even a tiny bit different than them. It’s mostly because we’re immature. Adults are extremely accepting in my experience.
Kids are less accepting, but also less discriminatory. No matter who you are, my 8-yeae-old self would call you a “copier” if you made a track that looked anything like his, and hate you for the rest of the day.