I find it depressing, and disgusting, and disrespectful (make that contemptible).
If he were my kid, he'd probably be standing there with his fingers in his ears while I delivered a filibuster-quality lecture about respect and commonly decent behavior whilst issuing definitions of words like "sacred," "icon," "tolerance," and "character."
That's what I had to put up with from my dad when I did dips**t things like that as a teen.
However, other than his own reputation, he really didn't destroy anything.
I want to live in a world where people respect religious icons, whether they are the icons of their religion, or someone else's religion, or their ex-religion that has caused them great personal pain and anguish.
I don't want to live in a world where it is a crime to fail to respect the icons of any certain religion or religions. That sounds a little too, I don't know, theocratic to me. I don't want to live in a world where it is a criminal act to make an ass of yourself in a manner that is, however offensive and immature, non-destructive and non-violent.
The kid, obviously, is a brat who has a lot of growing up to do. But making a criminal issue out of it seems sorta Pharisaic.
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"Alas, our dried voices when we whisper together are quiet and meaningless, as wind in dry grass, or rats' feet over broken glass in our dry cellar." --TS Eliot, "The Hollow Men"