When was that?
Oh...when I was a kid...
Quite obviously before you...
In the United States, it was an integral part of what we’ve always called “American values.” It hasn’t completely disappeared, but in the past couple decades it’s become watered down with European relativism and fatalism. In my youth, it was unheard of to consider killing disabled people just for being disabled. That attitude has always been associated with the Nazis. It was an important part of that ugly history we refer to when using the famous phrase “Never again.” We tend to find it baffling that anyone would welcome a return to those dark and hellish days.