You are pretty liberal with the death toll of British imperialism but are unwilling to apply the same objective standard to our own misdeeds.
You know a goodly portion of the Chinese death toll we spoke about earlier can be attributed to US intervention in China during the period of the New Imperialism. The Taiping Rebellion had it's roots in the US handling of the "Open Door" policy.
http://en.wikipedia.org/wiki/Open_Door_Policy
I think you probably realize this slaughter is the greatest of them all, and our policies instigated it.