Cutting off heads of infidels, honor killings, and hanging of homosexuals have not turned off liberals from Islam. Do you think anti-Darwinism will do the trick?
I bet an attack against the religion of Darwin would raise the liberal's hackles, but since the mainstream islamic position is one of theistic evolution (i.e., 'God' might have kicked the can to start thing a gazillion years ago, but the Darwinian model took over after the jump-start), they haven't crossed the line (apparently pushing for the destruction of Western Civilization isn't enough to raise the liberal's concern ... in fact, in the pursuit of this cause, they are allies).