Instead of jumping to the conclusion of rude behavior, asking him what he means by what he said or why he thinks he had that response. I promise he had zero intention of being rude or disrespectful and he very likely didn’t even realize he was or what that means. He got upset likely because he was startled by being in trouble for what he saw as seemingly no reason.
Always ask yourself what the intention of behavior is before reacting.
ADDitude Community Moderator, Parenting ADHD Coach & Author, Mom to teen w/ ADHD, LDs, and autism