How can I tell the difference between if a guy is being a jerk or is teasing me?

I saw another post with someone asking the difference between teasing flirting and teasing platonically, but I'm having the opposite situation. How does one tell the difference between someone blatantly being a jerk and passing it off as a joke or genuinely teasing?

Maybe this can also help others too. I'm a bit oblivious.

How can I tell the difference between if a guy is being a jerk or is teasing me?
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