It existed BEFORE. Just like their anti-semitism did. And from reading their web sites, I hope you get an idea of the extent of their dislike for the Jews.
Chechens? Maybe. The rest of muslim republics? Nope. I have friends from there, I have relatives there.. Their brand of Islam has nothing to do with wahhabism which is becoming more and more popular throughout the last decade. As for Kavkaz, yea, its your regular jihad site with a twist. They probably agree with you on quite a few things.