Sally, all you say here is just as applicable to women, people of color, people with disabilities. White males have long demonstrated these insulting behaviors, and the white savior attitude that too many of us share implies we have the agency to look down on anyone who isn't between the ages of thirty and fifty and fully able. Fifty is the new elderly, according to some wags, for God's sake. AS IF. Really? Just...Really.
Some people don't develop empathy until it's their turn in the barrel.By then it's too late, and they end up bitter and angry at what age has done to them. Karma is a bitch.