The ironic thing about the phrase “don't talk about politics" is that it’s a political statement.

What it means is do not challenge the status quo.

@wokerati And, of course, some topics have been made political by hateful people in the same way the US border moved southward to encompass Hispanic communities that had lived there for generations, who were then called illegal aliens by white transplants.
@WhiteCatTamer in some ways humanity has always transgressed borders. Even before the Spanish colonies there was migration via Beringia. I think the problems arise because of claimed entitlement and a seizing of the commons.