Robert Spencer from Jihad Watch shows how Google automatically offers viciously derrogatory search suggestions on phrases such as "Christianity is" (I also found it does the same for searches on "Catholicism is," "Pope Benedict is," and "the pope is"), but it does not do the same when someone searches "Islam is." In fact, as Robert points out, type in "Islam is" and Google suggests . . . nothing at all.
Draw your own conclusions.