My sister is rude, how should I react?

My sister takes being rude as a "funny" persona. I tried telling her more than once that it's not okay for an adult (23) respectful woman to always be pissing people off because of how she makes rude jokes or straight up telling them to shut up as a joke. Not only me, but other family members and even coworkers have told her that in the past month alone!

When I confront her whenever she's being activity rude and mean to me, she'd always tell me to "stop being crazy" which makes the conversation already unproductive.

She'd then get upset and say: "oh, I just have a bad personality and that's why everyone is always getting mad at me" and make it sound as if I'm telling her that she's a completely bad person.

That's not how I see her, but she's so much and doesn't really care about how her words affect people or how to say things appropriately. Should I just ignore her and bite my tongue or what should I do?

My sister is rude, how should I react?
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