Actually, I don't know if you can believe anything that CAIR says. They are terrorist sympathizers posing as human rights advocates.
But if you read this article closely, it looks as if the group in question is not Muslim, but some kind of crazy sect.
Still, CAIR is misbehaving as usual. If the article is to be believed, the police and press did not call them Muslims. So, why is CAIR complaining?
And the difference is???