We were told that there were weapons of mass destruction in Iraq. That was our reason to invade another country. And of course, the real reason was for revenge on 9/11. (Note: Nobody wants to invade North Korea or any other place with known weapons of mass destruction, ie nuclear weapons.)
After doing our search and finding no mass destruction weapons, we should have declared victory and pulled out. Would it leave chaos in our wake? Yes, of course it would have. Is there going to be chaos when we pull out now? Just as much. I don't think that there will be that much freedom that long in Iraq after we leave.
As far as 'freeing people enslaved' or being killed, there are a number of African countries that fall under that category, but as long as they don't blow up our buildings, then that is allowed to continue.
Torturing the numbers. Hear them scream.
