This conflict is called "civil war" by some - but officially it's not (yet, everyone acknowledges it may BECOME, and this practically any moment - imagine, for example, if the Sunnis assassinated Sistani). The UN people are (neutral) experts and they say it's "Islamic extremism" (and they were actually hit in one of the insurgent attacks, unrelated to the sectarian violence - talking about "being there"). You are just an amatour and the UN wouldn't even ask you for your opinion - get over it. Problem is, people can go here and think the so-much-talked for years now ("sliding towards", "escalating into") civil war is declared and going on, and get confused. This is misleading, to say it mildly. If you are aware of that, this is vandalising. When I first came there, it was even worse - the insurgency (including attacks against Coalition forces) was confused with the sectarian violence (probably copy-pasted without thinking). 

Oh, and don't talk silly (crazy?) about some "flowers and music". Anyway, I'll answer seriously: the main articles for you are Iraq war, Iraqi insurgency, sectarian violence in Iraq - as the articles' titles alone say, there is "war", "insurgency", and "violence" going on there, each one connected to another (well, Iraqi music is actually too). There are also multiple sub-articles - plenty of these, some with the names like "massacre" (as for your "BLOODBATH"). There even articles on the casualties. Here, you can go back if the "civil war" officially started (that is, declared by the other side-the Shia militias, the government of Iraq, or the UN - the media will start calling it by this name, too).