First, I may or may not have privately held views about the morality(or lack thereof) of US foreign policy post WW2(hint: If you look at my comment history, you can probably figure it out given where I've stated that I live and some oblique comments pertaining to the subject). However, the above comment was specifically meant to not make a statement about the subject so as not to fan the flames any further, but only act as a refutation of the statement it was replying to based on historical facts rather than moral arguments.

Second, your statement is patently untrue. The genocides(against the Jewish people and countless others as well) perpetrated en masse by the Nazi state have nothing to do with self-interest or looking out for oneself. So no, this does not apply. If we were talking purely about their expansionist policies and invasions, then you may have had a point, but that's not what people usually mean when they, rightly, hold up the Nazi state as an example of criminally abhorrent and repulsive behavior.