As much as I despise Schumer, the word “retarded” is just fine. It’s what sane people used to call retarded people. Now, calling them “retards” or “tards” isn’t very nice... I reserve those terms for democraps. :)
Remember when the establishment forced us all to use the word “special” instead of “retarded”? That permission only lasted a couple of years before “special” was outlawed too.