Since they shouted "allah akbar" before they slaughtered some of the kids, it's clear they were motivated by their religion --- and the mainstream media won't even report about that. They don't even switch "allah" to "God" and report they shouted "God akbar". It's clear the media has an agenda here and it's not the truth.
I don't doubt it. But, out of curiosity, what's your source (since the media won't report it)?