How would this make you feel, if your boss made the following statement?

He was telling me how he was unhappy with our maintenance guys and the paint job they did. They king over to our school to patch some holes and then they painted over the holes and because they weren’t painting the whole wall the paint apparently doesn’t match perfectly. And then he said to me they probably did a crappy job because they don’t care that we have autistic kids in the building. Now I know these guys. They don’t work directly with kids but they care about doing a good job and I’ve never thought that any of them were in any way prejudiced against people with disabilities. So it makes me really mad that he would make that statement after being there for two weeks and not even really knowing them. Sure he might not be totally happy with the job they did, but to accuse them of something so heartless… I guess that’s leaving me wondering what kind of person he is that he would assume that about somebody. And I kind of feel that too somebody else of being prejudiced unfairly makes the person doing the accusing almost as bad as someone who is prejudiced. Thoughts?