You know, if you think about it, this sort of thinking (i.e. liberal) equates arabs with animals: They're saying, "it's their nature, like a predatory animal, and they can't change it. It's just a part of nature."
In a situation like this, maybe they need to have it explained in another way... Let's say that there's a bear on the loose in your neighborhood, and it's begun killing people. Would you say, "who's to say if the bear is right or wrong in killing people?" Well, maybe a lot of liberals would, but once a few of them have come out of the south end of a north bound bear, I'd bet that their friends might start thinking about getting rid of that bear.
Mark