Since you included WWII Germans in your evidence set of those punished for "waterboarding" your "non-white"argument is destroyed.
Further more "abuses" are not the reason for the collapse of imperialism!

Quote Originally Posted by SadisticNature View Post
The leader of the resistance in the Philippines was intent on establishing a democracy based on the US constitution. The US decided they needed to be in charge which meant destroying democracy and putting up a figurehead.

Also, the kind of atrocities committed by imperialist powers are exactly the reason imperialism has largely been abandoned.

And if by some people cannot be reasoned with you mean the Americans in said situation then by all means I'd agree. But the Philippines actively worked to throw off their Spanish oppressors and welcomed the US, in the belief that their Constitution did not support colonialism. The US decided to make the Philippines a colony and put down resistance resulting from this betrayal with orders like "shoot anyone over the age of 10".

I'm not saying other imperialist powers didn't do equally terrible things. I'm just saying the US has a long history of war crimes against non-whites, and tends to consider them as mild offenses, while the same acts against their own citizens are cause for execution.