Is there any mental disorder that makes people violent?

I know a guy who tried super hard to date a 300 pound girl. She told me she believed he was autistic. Later he was swearing at her by telling her she was a slut and a whore and a gold digger and worthless and he would mock her for having parents who didn’t like her very much. He would also refuse to meet her parents and he wasn’t using her for sex since they almost never slept together. Did he have a mental disorder that made him violent?
Is there any mental disorder that makes people violent?
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