My friend's 12 year old son with Down syndrome ruined our vacation.
Would your vacation have been okay if he didn't have Down syndrome?
Yes, it's only because he has Down syndrome.
While you might have been upset at your friend's son, you shouldn't blame him for ruining your vacation because of his disability. People with Down syndrome are not responsible for their condition. You should be more open minded and patient towards people with disabilities as they lead difficult lives and need understanding from others.
Are you for real? I bet he's the reason my friend divorced.
Would you want people claiming your disabilities ruined their vacation?