Clearly there is morality in geo-politics. There's a reason the US got involved in WWII, and that was to help stop German Imperialism and end the slaughter of millions of Jews.
You can't really believe this. The reason we got into WWII was to prevent Germany from becoming a continental superpower capable of rivaling us in the long-term. Not because anybody really gave a sh**t about the Jews. If what you said was the case then why didn't we go to war with the Soviets to stop Stalin's crimes? Oh right, because that's not how serious foreign policy is conducted.
There's a reason the US went into Iraq, and that was to topple a regime that was murdering innocent civilians in Kuwait. Whether you agree or disagree with whether or not we should've gotten involved in WWII or Iraq, you can at least see my point.
There you go again. No, we went into Iraq because we wanted it as a political power-projection point, and to encircle Iran. If what you said was the case we wouldn't have been such staunch supporters of Saddam in the 1980's.