My 15 year old son got fired from his first job for calling a woman a karen bitch.

Context: My son got a job as a camp counselor and was really excited because he likes working with kids. They took the kids on a field trip and there is one boy who really like him. The boy has autism and has a lot if melt downs but my son does well with him. They place they rent was a skating place that also had laser tag and a play area. They play area had sensory hour where if any kids with sensory issues signed up everything would have to be quiet for an hour so they could enjoy themselves. They try to create a less overstimulating environment. My son helped the little boy sign up and he was the only one too. He usually has on his noise cancelling headphones. There was a woman complaining saying if it's only one kid then they should skip sensory hour and why should her kids have to be quiet because of disabled kids. Keeps complaining about people with disabilities and started saying he doesn't even look disabled. Things got out of hand and she made him cry and my son lost it and told her to go be a Karen bitch somewhere else. Bad choice if words. She complained to his lead, then he got fired when they got back. I was upset. This was his first job. But the mom of the autistic boy reached out to me saying thank you for raising a boy who stands up for her son and that he really likes him and doesn't believe he should have been fired. She even offered my son a babysitting gig for here and there. I don't like how he handled things. It caused a scene and he got fired. But maybe getting fired is punishment enough?