Again, you're blaming the bystanders more than the killers? ... Lots of people seem to have this double-edged misperception that one can both stop mass atrocities in the world and not be an interventionist. To be a part of stopping something, one must intervene. I'm not trying to argue for it, or against it, just saying it's so. ... Post World War II, we have been one of the world's four "policemen" as a matter of policy, https://en.wikipedia.org/wiki/Four_Policemen. To stop serving in that role, considering our power in the world, would be a major shift in national philosophy and leave many of millions of people around the world vulnerable to tyrants, such as Assad