Call it whataboutism if you want but I fail to see how any American can claim a moral high ground and why they would want their government to do something about this above what they themselves are a part of.
Unless of course they didn't want the war on terror either but I very much doubt that the average American cares as much about the Muslims killed after 9/11 as they do about the Chinese Muslims. It smells of repeating propaganda to me. Sure this should be stopped, but it is not as high up the list as what the US does to anyone who actually care about the people and not just the politics - after all the amount hurt is extremely loopsidede.