Breckinridge Long is the very first name to prove that wrong. He was the US Secretary of State at the time Hitler was in power and gave Henry Ford permission to buy Nazi tanks while purposely preventing Jewish refugees from entering the US. He and Roosevelt also gave permission to the US companies I mentioned above to continue trading with Nazi Germany during war times.
For them, it wasn't so much about liberty and human rights as it was about business. That's still the case today. The US #1 trade partner is China, who happens to have a pathetic human rights record and is also still occupying Tibet. But opposing them in any way would be bad for business, so it gets shoved under the rug.
Out of sight, out of mind.