Here's an authoritative report from someone who was there (albeit in the Green Zone) when the bombs went off in Baghdad, wrecking the Shiites' major mosque. Read the entire post, please, including the ominous language of Shiite Cleric al-Sistani at the end. If that doesn't mean civil war, I don't know what.
For another on-site report, this from a resident of Baghdad, read this. Does it sound ominous? Kinda like a quote from Anne Frank's diary, maybe?