Trump likely to acknowledge Jerusalem as the Capital of Israel

[Viking]

So when Hitler attacked Russia for more Lebensraum and wanted to ethnically cleanse it of slavs, the slavs were safer as an ethnic group because they had their own state?

If the Soviet union were divided between Turkey, China and Japan, I think e.g. ethnic Russians would be less safe in this situation, yes. If Turkey lost control over Moscow and Saint Petersburg, they may have thought that "that's a shame, but at least we hold Volgograd and can form a new border there, leaving the rest to the Nazis". Hitler, having gained more Lebensraum, is happy to start the cleansing and otherwise refocus his military efforts to the western front.

And the USA joined in to help right away because it was all so obvious.

It was obvious, but you equally obviously have no guarantee that anyone will step in regardless of whether the cleansing happens within Germussia or Russia. Safer, not safe (don't be lazy).

Especially if the world had half a bazillion countries, they'd all stand out more than half a bazillion provinces.

How many states of Brazil can you (or the average European) name versus how many South American countries? About half of South America's population lives in Brazil, and the country covers almost half of the continent.

Like the obvious military operations in Ukraine that made the world's militaries rush there to help?
Or the dubious goings on in a province in Eastern Spain that went completely under the radar?

No cleansing of the majority population going on in either of those places. Krym seems to have Russians as the major ethnicity - same as the occupying country. If the endemic ethnicity - the Crimean Tatars - had had their own state there (i.e. they weren't a minority, like they are now), the Russian occupation would have looked much worse.