They can't respond or defend logically, so they resort to personal attacks.
God that sounds real familiar, doesn't it? To get back to the Dubs. I am not all that suprised as I used to be at that sort of thing. The fact is they cannot really rebute such things on the their merits. So they resort to the tactic of desparation, name calling. This is usually the resort of the narrow-minded and seems to be chic at this time in religion politics and other areas as well. That they do not see incongruency in their actions with their oh so superior moral claims really highlights their narrow-mindedness. As Mr. T likes to say, "pity the fool!"
Forscher