Why iraq's people kill soldiers

U.S. and U.K. release iraq's people from suppression.
But iraq's people kill soldiers of U.S. and U.K.
Why?
 
Please teach...

Ah, yes.  Blame Israel.  The US should reward terrorists by abandoning our only ally in the Middle East, and one of only five or six allies this country has had since World War II that are more than just dead weight, to people whose stated intent is to "drive the Jews into the sea," i.e., total extermination, to the last man, woman, and child.

Reward terrorists and you guarantee that it will never, ever, ever stop.  Show terrorists that they can get what they want by killing Americans and you guarantee that no American will ever be safe, anywhere on Earth, again.

Islam is a terrorist ideology.

And yes, Christianity is as preposterous and ridiculous as Islam, but no Popes have called for the total extermination of all non-Christians lately.  The difference between Christianity and Islam is the difference between influenza and ebola.  Both are unpleasant and debilitating, but one is lethal.