What can I do to get my significant other to understand he needs to be more patient with my mom?

My mom lives with me and my significant other. We have issues with her opening/closing doors when she shouldn't. She also tries to "control" her cat, and lock it in her room, which seems to really get on my boyfriend's nerves. I just open the door back up, or close a door that needs to be closed. He seems to think she needs to "learn" not to do certain things, but my mom is past the stage of learning. I don't believe she does these things to be difficult, she just does them. This is the second day I have found her closed in her room, unhappy, because she thinks she "screwed up, again". He seems to think the problem is that "we" (people in my family) aren't used to being "called out" on our inappropriate behavior. How can I get him to understand?