I strongly disagree. I have studied martial arts quite extensively, and even I would say that one would have to be insane to take on a ferrocious beast like this. Of course, the commandoes and marines will study hand-to-hand as part of their training--not that this would be their preferred choice of combat. And Kilrathi are not animals. They have H2H training as well (and this is against other equally sized creatures).
While I do not remember the exact quote, the ConFed Handbook pretty much summerized like this, even armed with a knife or staff humans are greivously overmatched against Kilrathi warriors. The three-inch Kilrathi claws are capable of cleanly severing a human spinal column, and the average Kilrathi warrior has sufficient strength to lift about 700kg of dead weight overhead. Proving that even with a weapon (or maybe a bayonet), hand-to hand combat is not recommended. And even if the marine was fairly strong--say that he could lift 200kg, the Kilrathi is still just so much more powerful that the odds are really aginst the human.
I agree with Pendell, bare handed human against a Kilrathi--no chance.
If human was armed with a weapon--their is a small chance, although the human is still "greivously" overmatched.
By the way, if you have not yet noticed, I'm a Kilrathi sympathizer