I enjoyed it too. "Chrisianist" is inflammatory, clearly intended to equate Christians who disagree with Sullivan to Isalmists.
I pretty much stopped reading Andrew Sullivan after his intellectually dishonest attempt to explain why he was voting for Kerry. He laughingly argued that it was because Kerry would do a better job of fighting the War on Terror, but anyone with a brain knew it was due to gay marriage.
Sullivan called those who made such a charge as engaging in an "unanswerable smear". But it is worth noting that if you go through his archives, you'll notice almost no criticism of Bush's handling of the Iraq War before February 2003, when Bush endorsed the Federal Marriage Amendment. After that, Sullivan suddenly became concerned about the "administration's incompetence and arrogance in Iraq."
Coincidence? Yeah, right.