There is a whole series of issues in your commentary.
First of all, there are extensive ongoing discussions between the UN, the Iraqi officials, and the camp officials to find a solution: an extension, and possible relocation inside Iraq.
To leap to an assertion that the Iraqi government would deal with them in some way, the presumption being that they would be killed, is a leap too far—and one that has not, frankly, been demonstrated.
I concur that what happened on April 8 was appalling, but investigations need to be undertaken to determine exactly what happened, who precipitated the action, and whether or not this was government policy. The Government of Iraq asserts the residents were throwing stones at them as they were making a simple redeployment of the troops. We actually don't know.