MMA is to martial art what modern warfare is to the art of war: achieving supremacy, regardless of the means. A testimony of our times.
Spirituality and mysticism aren't part of this any more than they are part of trying to run 100 meters as quickly as possible.
That statement simply shows your complete lack of knowledge about martial arts.
MMA, and Krav Maga and Systema, are martial practices. But they are certainly not art forms.
There is nothing wrong with practicing ancient martial arts, it's just outdated for combat with practitioners of more evolved combat techniques.
There's been Karate+Judo fighters in MMA, and various boxing and wrestling style fighters as well. The only judgement for MMA fighters is that in the ring.
It's silly to say traditional martial art is in some way morally superior, they are just combat techniques. Techniques for violently oppressing an opponent. As evidenced by this Tai Chi master accepting the challenge to a fight.
I'm exaggerating, but only a little :)
MMA or Krav Maga basically represent applying the scientific method to brawling. In many respects they are a testimony of our times... as they're efficient and in many respects cleaner than the fights of old: an experienced MMA fighter can take out an opponent while causing him minimal lasting damage. If he wants to :)
Of course, we can always go back to pre-civilized societies to justify barbaric behavior.
Pretty much everywhere, during every war.