.. a coward?
Google is claiming that this is a bug, but it does seem rather unusual that the religion with the most easily offended followers isn’t showing up with suggestions. In other news, the fact that “Tiananmen Square” doesn’t show up in Google-China is also a bug.
By the way, I tried this in google, just to confirm it. It’s true. (Source)
It’s true that “X is” won’t show up with auto-completion if it isn’t popular enough of a phrase, but “Islam is” will return 3,320,000 results. “Christianity is” only returns 2,480,000. “Atheism is” shows up the auto-completion, but only returns 526,000 hits.