Probably cuz they're STUPID! If they were hit by a bus I'm sure they would have second tho'ts about a lot of things. Don't worry about it. Kids today are just rude. Their parents are rude so they don't know any other way to be. We live in a rude society! They think you're different from them so...
I was in Paris many, many years ago - 1973. I remembered seeing a painting titled something like "The Beheading of John the Baptist". Of all the popular paintings and sculptures and artifacts, I remembered that particular painting over everything else. For some reason tho, I can't find it listed...