Racism and immunity

The US troops are leaving Iraq after spending 9 years and almost a trillion dollars not counting lives lost since that is the least concern during war. Lives are cheap since even the returning troops are not going to have jobs and face foreclosure like everyone else. One of the reasons provided for a saving face withdrawal is lack of receiving immunity. Who else except a racist expects immunity. For centuries whites from Europe colonized the world and implemented laws that provided whites immunity from crimes against nonwhites. Today even with all the speeches of democracy and freedom for Iraq and Afghanistan there is still an expectation that Americans have immunity from criminal prosecution. How there can be any question that any group can be above the law is hard to fathom but the national expectation that immunity is absolutely acceptable must be traced to the legacy of racism that still persists.
Would the US ever provide any group immunity from murder at will? Would the US even consider providing foreign mercenaries total mmunity? The fact that the US cannot see the absolute antipathy of democracy and freedom from such an expectation only shows how deeply engrained racism has become.