By Andrew L. Jaffee

As if the Sunni vs. Shiite violence in Iraq wasn’t evidence enough that Islam has a problem — “Thunderous explosions and dense smoke swirled through central Baghdad on Monday when three car bombs ripped apart a crowded marketplace in a Shiite neighborhood, setting off secondary explosions and killing at least 71 people, police said. A suicide bombing nearby killed at least nine…” Here’s some more evidence, if you can stomach it:

Egypt’s president questioned Shiites’ loyalty to their countries, Jordan’s king warned of a coming Shiite crescent from Iran to Lebanon, and last month King Abdullah of Saudi Arabia denounced what he called Shiite proselytizing. …

Shiites make up less than 15 percent of Saudi Arabia’s population, many of them in the oil-rich Eastern Province. The austere Sunni religious establishment considers them heretics. One cleric, Abdul Rahman al-Barak, considered close to the royal family, has called Shiites “infidels, apostates and hypocrites.”

And, of course, let’s not forget al-Qaeda’s official position on “fellow” Shiite Muslims:

People of discernment and knowledge among Muslims know the extent of danger to Islam of the Twelve’er school of Shiism. It is a religious school based on excess and falsehood whose function is to accuse the companions of Muhammad of heresy in a campaign against Islam, in order to free the way for a group of those who call for a dialogue in the name of the hidden mahdi who is in control of existence and infallible in what he does. Their prior history in cooperating with the enemies of Islam is consistent with their current reality of connivance with the Crusaders.