Hitler developed a mindset that a certain wholly innocent subgroup within humanity deserve to killed. Americans have collectively done the same thing, with the the help of our so-called "legal system" and its Supreme Court. First it was the subgroup of millions of inconvenient babies in the womb. Now, it is also the subgroup of inconvenient disabled. The inconvenient elderly are next.
We love to call Hitler crazy while considering our own barbarism justified, moral and sane.