My boyfriend insults my parents and it makes me angry?

My parents and I have had some issues in the past that I have told him about that have made him angry. My parents used to get angry with me and make me depressed, but I still love them anyways. I showed him pictures of my parents and he laughs. He says my mom looks old and he calls her a bitch sometimes, and he calls my dad an asshole. It makes me mad because I am grateful for what my parents have done for me. I don't want him to meet my parents and start an argument with them or something. What should I do? I don't want to break up with him because I love him a lot. It just makes me so angry when he insults my parents, however.
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I talked to him about it and he stopped and hasn't brought it up since.
My boyfriend insults my parents and it makes me angry?
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