Is my mom right or wrong for shutting down my brother's statement?

Tonight post-shopping, my brother (a preteen) and our mom had a conversation about this thing called the "monkeypox" or "monkey virus." He asked if it was not "kinda racist", and our mom got mad and lectured him that it was an animal and that he basically had no right to call that term "racist" in a really pissed-off situation.

But she also went on to say that "they're not calling a human being a monkey," but rather it is a term made up because the virus was "possibly" founded in monkeys.
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In addition, my brother was going to bring up something about why the term "monkey virus" was considered racist, and he was going to say that someone else called it so and our mom basically said she doesn't care (but in a more subtle way).
Is my mom right or wrong for shutting down my brother's statement?
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