Where on Earth are the moderate Muslims? Thanks to PBS, they’re not on public television. PBS has blocked the broadcast of Islam vs. Islamists: Voices from the Muslim Center. This new documentary — funded with a $675,000 Corporation for Public Broadcasting (CPB) grant — contrasts the ubiquitous bearded, burka-covered Muslim radicals with others seldom seen: men and women who wear Western attire, shave daily, show their female faces, and prosper without slaughtering “infidels.” While moderate Muslims may appear elsewhere on PBS, Uncle Sam’s TV channel declines to air this compelling, even-handed, and surprisingly tame film that explores the struggle between...