But…
Ah, this is "a lesson about how to exclude white people (still the majority of the country) from any social justice movement." Characterize and belittle any of them who try to engage and support a cause.
If they can't relate and want to have a conversation about it but challenge some of the ideas then they're the baddies. If they don't just repeat the movement's slogans without thought then clearly they should be excluded. This honestly feels like a right wing subversion tactic.
Yes, I know there are people like the post. People who love to argue and do it for the fun of arguing. Those people do cause trouble if you're trying to get a consensus or get something done.... But just like "welfare , queens" or criminal illegal immigrants, they feel like the minority where this is intending to paint a large group of people with the same brush.
It's usually not good to make fun of people who are trying to help, or you teach people to shut down and not engage with your cause. If the statement is you have to have experienced or you can't relate, then why bother having a movement because you're not trying to convince anybody who isn't already on your side.