The thing about them being Islamic Fundamentalists and connection to Al Qaeda is right from the info I've read.

A lot of Slavic groups went into war with Chechen groups in the 90's, like Solntsevskaya and Orekhovskaya for example.

Chechens are like hot heads, for example if you have beef with them, and set down a sit down. Then most probably you'll get the Chechens just arriving and shooting everyone up without a word being said. They are like gypsies, they stick for their own kind and stand for each other no matter what. They are like wild animals. A lot of Russians hate them for that and other Souther USSR nationalities. Because nowdays Russians tend to do everything trough sit downs and only then someone gets shot after it. But these animals don't do the thing.

The Chechen crime group in Latvia is pretty major, as they have even Political connections.