Well, there are certainly passages in the Quran that promote violence.
http://www.thereligionofpeace.com/quran/023-violence.htm
There you go, I don't see how you can deny that. What's terrible about Huckabee here is that he seems to be painting the Muslims as possessing a type of inherent violent nature. Surely, Huck would never point to some of the more disgusting Bible verses and try to say that Christians promote violence.
There are far too many people on the planet that would like to say that we are in a worldwide struggle between the forces of Christianity and Islam. Huck, you stupid bastard, you are not helping.
Islam is a warrior religion to the extent that Islam was founded during war. The historic context is war. Christianity, in contrast, was founded in the context of subordinate peoples in a very-intact empire.
Treat Muslims brutally and expect a warrior response.
Islam acts differently in time of peace.
