OP, the wording of the post is very confusing. Would you mind perhaps editing the post to clarify your opinion?

Thanks!

I don’t think this is unpopular, it’s just another racist dog whistle.

The thing that’s dumbest about it is that reverse racism would be hating your own race rather than another. Like, racism is hate/prejudice/discrimination against a different race than your own. It’s right there in the concept itself.

The fact that it was white racists that came up with the term says a whole lot about how dumb most racists are.

Like most words, “racism” has multiple definitions. If you only know one usage, then the concept of “reverse racism” doesn’t make sense. Let’s look at dictionary.com:

racism

noun

1. a belief or doctrine that inherent differences among the various human racial groups determine cultural or individual achievement, usually involving the idea that one’s own race is superior and has the right to dominate others or that a particular racial group is inferior to the others.
2. Also called in·sti·tu·tion·al rac·ism [in-sti-, too, -sh, uh, -nl , rey, -siz-, uh, m, -, tyoo, -],. a policy, system of government, etc., that is associated with or originated in such a doctrine, and that favors members of the dominant racial or ethnic group, or has a neutral effect on their life experiences, while discriminating against or harming members of other groups, ultimately serving to preserve the social status, economic advantage, or political power of the dominant group.
3. an individual action or behavior based upon or fostering such a doctrine; racial discrimination.
4. racial or ethnic prejudice or intolerance.

These are all clearly related, but they are not the same. “Reverse racism” does indeed fall under #4 (“racial or ethnic prejudice”). #4 is probably the most common definition when used colloquially to refer to an individual’s actions or statements.

Definition #2 is more broadly used when discussing matters of public policy and legal issues, which is where you are likely to hear “reverse racism”. The key point of institutional racism (#2) is that it is part of a power structure — there is a group in power that the policies serve to support and strengthen, and there is a group lacking power that the policies serve to oppress and weaken. “Reverse racism” in this context makes perfect sense: it’s reversed to support the oppressed group instead of the powerful group.

What the hell is reversism?
Google gives me urban dictionary with equally bad phrasing:
https://www.urbandictionary.com/define.php?term=Reversism

“Just because it’s harder to recognise when it’s the other way round”.
Recognise what? Other way round from what?

So, people apply “reversism” to a discriminatory phrase/act/joke to make it easier to recognise that it is discrimination? Because, with “reversism” applied, it now applies to themselves, and they can then empathize with the original target of the discrimination?

And you are painting empathy as a bad thing?
Or, something else?
These are all questions, because it’s my thought process and I still don’t understand your phrasing or premise. So, maybe someone can answer?