I just read the OP. I guess people are going to say it was a Muslim.
All I know is that the Orthodox are the biggest iconoclasts I've ever met. With all the catalogues, parish news that goes into the trash, calendars, icon bracelets, etc. This is not to mention the icons people use on their desktops, for "avatars". Awesome, Mary is your own personal avatar on the internet. How humble. How many icons did you destroy sending those icons into the trash bin on your computer looking for one online?
I've never met anyone but an Orthodox or person interested in it treat icons with such contempt.
I guess if you stuck these things in a parish in Ethiopia and some one who isn't Orthodox makes a big to do with throwing an icon away rather than quietly mass mailing and the like, it makes news and makes people sad.
Calling the police? Christians? OK.
The only thing I find more grotesque is the amount of money that is put into commissioning icons from Mt. Athos and having bragging rights that go with it.
You have priests who can barely make ends meet, but we'll throw a couple 100k for icons.