You have to remember that America through the fault of incredibly racist people has kind of fucked itself with regards to culture.

See, there's the promise of a melting pot, where all cultures come together, share the better parts, enjoy the better parts, and happily so. Now, this also requires some grace--people are going to come up with stereotypes and those stereotypes are going to be abused for racism purposes, and some people will take offense to that because what they're trying to do is make sure other people feel comfortable, and having some racist do racist shit is actively harmful to that.

The problem with that is that sometimes the stereotypes are just good reads on individual cultures. Sometimes they're done in good faith cultural sharing. It's just kind of fucking HARD to, from the outside, decide "Is this person doing an offensive vaguely Asian accent to make fun of people with an accent or is it someone with first hand experience about their grandmother's English after she fled the Khmer Rouge and many years later though her children can speak English without a Cambodian accent she still cannot."

While a lot of people would err on the side of caution before trying to correct that behavior, we also have a lot of examples of erring on the side of caution getting people killed--a rich history of mass slaughter and discrimination against just about everyone, including at some points, ourselves.

It's probably better to err on the side of caution sometimes, without trying to 'correct' what we view as racist/inappropriate behavior. As always, it's probably better to talk to someone whose culture you think you're defending before you go out and defend them. That's what 'cultural/diversity' readers are typically for. You can be bigoted without even realizing you're being bigoted.

For instance, black culture views their hair as important--it is something that was literally stolen from them culturally in the United States, and something they still are discriminated against for having today. Some states still allow discrimination, forcing them to spend hundreds of dollars a month on products to make their hair start to resemble everyone else's. The problem? Their hair LITERALLY does not conform. Those products destroy their hair. Some types of hair literally can't be straight, and students are punished for not being "acceptable" with regards to their hairstyles. The styles their hair does work well in are banned. This leads many black people to shave their hair entirely. That's why you sometimes see black women with wigs instead--those at least can conform. Black hair is HEAVILY policed, not just by white society but by other black people sometimes, too. So when you take hairstyles that they use because their hair doesn't conform to the more common hairstyles, you're probably harming your own hair... to look more like them. But they're just like the example above. They don't know if you're harming your hair to look like them or if your hair is the type of hair that does better in rows or dreadlocks. And nobody ever explains this.