Gee, I teach my children that polite people don't engage in that behavior. I suppose two wrongs makes a right.Sure and I teach my child never to hit anyone or call them names. But I also teach him to defend himself when attacked.
That's what Coulter is doing.
I would guess Coulter developed her style of discourse by being in the trenches and fighting the hard "hand to hand" with the dems. It is a war out there and the sooner more Pubbies learn that, the better.