Online etiquette

My Indignant Response to People Who Use Autism as an Insult

This is something I've noticed over the years, especially in comment sections (Youtube is by far the worst), online gaming, and other cyber spaces where people gather. I'd like to know just what the hell compels keybord warriors on various sites to use autism, autistic, or autist as an insult. It's no different than calling someone a retard or retarded.