Uh, because it's disgusting and repulsive and indecent and grossly disrespectful to those who are already dead and those who will die in the next few days? Is that a good enough reason?
If you want ammunition to deal with the lib/dems who are throwing it in your face, try this: "I'm revolted that you would even think of politicizing this tragedy while the bodies aren't even cold yet. If you want to talk about whose fault this is, I will be happy to oblige you... later." That's all the response such a slimeball deserves. Anything more makes you a slimeball just like them.
Fine. Lay low and be decent. When you finally decide to raise that finger, you'll be digging yourself out because the liberal press will have buried you in trash stories. We on the right always take the high road and wind up on the sh*t end of the stick because the moonbats play hardball.
This has nothing to do with respecting the dead; we can respect the dead and defend ourselves against their scurrilous, deceitful attacks at the same time. They fired the first shot. We have to defend ourselves.