People with an extra chromosome. It's the only thing they have a 1-up on.
This is a shocking way to try to be humorous. Do you think people with an extra chromosome are different?
Yup. I do think differently of mentally disabled folks. They are dumb.
Are you aware your comment could hurt a lot of peoples feelings? I think every person has value and worth. How would you feel if you had a child who was born disabled?
It's just a joke. I'm not trying to offend people. Just telling it like it is.
Your "joke" about people that are mentally challenged is offensive to them and it is not okay to portray them as being lower than other people. Spend some time volunteering with the mentally disabled and you will see that they are quite capable.