Militias clash in Basra

There is something I always ask my self, and if I do not get answer I will ask the people, but I also do not get the right answer which I think is right. My question is why war happened in Iraq? That was not accident, it is so clear to me and other people, but is it any specific reason for killing the poor people, who does have nothing to do with war, murdering lots of kids. Any way, there is something happened and should be gone for right now, but unfortunately Iraqi people still having the American troops as guest.
After this entire introduction I do want to say that what happened on past Tuesday in the southern of Basra. Explosion rang out across central Baghdad as rockets fired from Shiite areas slammed in to the U.S protected Green Zone for the second time this week. The U.S Embassy said no death or major casualties were reported. Two rockets landed on Prime Minister Nouri al-maliki”s compound but did not explode, an Iraqi government security official said, speaking on condition of anonymity because he was not authorized to disclose the information.
Al- Maliki flew to Basra on Monday to supervise an operation against the Shiite militia fighters amid spiraling violence in the city. The violence was part of an escalation in the confrontation between the Shiite- rur government and al-sadr”s followers _ a move that threatens the security gains a U.S. and Iraq forces. At least 22 people were killed in the Basra fighting.
So here I am asking why those people have to be killed, it is something related to government not those poor people. May be one of them was man of the house who the only person in home to bring bacon in house? Or may be was the mother of the house who had to take care children? Why should this happen? Is it any solution for that? How long this poor people have to wait to get their freedom bake?
In my conclusion I hope the best for every body, and I hope nobody stay hungry in this world, and nobody loss their family in the war. I pray the freedom for the bird that’s in cage.