Fun fact: Since they are from Chechnya they literally are caucasians from the Caucasus region of Russia. So I guess the MFM will at least have that to hold onto as their Tea Party conspiracy wet dreams come to naught.

Just like clockwork. What a total dumbass.
Technically, "caucasian" means anyone from Europeans (who we most closely associate with the term) to Berbers of North Africa, to Arabs of the Middle East, to Turks, to Persians, even India. But yeah, I know the media is going to do a Zimmerman with it.
And honestly, I've been wondering for over 10 years why they haven't been doing these kinds of attacks. They're logistically much easier to pull off, and create a whole different kind of terror in the population. Now it's not getting on a plane or traveling to an unsafe part of the world, it can be anywhere there's a lot of people.
I am advocating outright, unapologetic racial discrimination against people of ethnic groups closely associated with Islam. And you know what? Start getting more attacks like this, and the whole "multiculturalism" house of cards is going to fall because people are going to start practicing racial discrimination whether they feel right about it or not.
And at the same time that happens, the State is going to subject us to a whole new level of infringement through its security apparatus. The question of whether that is in fact the goal behind all this can be left to individual interpretation. But that's going to be the result whether or not it's any kind of conspiracy.