The Left's "Manichean Error"

The fabulous Mark Steyn does it again. Here's an excerpt:

Why is George W. Bush's utterly unremarkable evangelical Christianity so self-evidently risible but complaints from British Muslims hung up over the 11th century are perfectly reasonable and something we should seek to accommodate? Where is the secular Left's "insensitivity" when you need it? No doubt the bien pensants will still be hooting at born-again Texans on the day the House of Lords gives a second reading to the Sharia Bill.

Indeed.