My oldest is dating a young lady who has a sister with down syndrome. She is a handful but he still goes to her shows and the last time went to her school show and brought her flowers.
You are right about parents. I have watched during my kids growing up the kids who are rude and disrespectful. You then look at the parents and know why these kids are like they are.
It all starts in the home and early, doesn’t it? My daughter is a Freshman in high school... has a large group of friends and they eat together at lunch. A nice, young girl with some sort of mental disability was being teased by some of the students. My daughter walked up to her and asked her to sit at their table. She now has “her” seat with the “regular” kids (that is her statement). There are times in your kids lives when you aren’t happy with them... then there are times like these that you are just beyond proud.