Russia claims to have moved nuclear-capable missile system into Belarus

No, as long as it's Russian military who operates them.

However American nuclear sharing arguably is[0]. German pilots and other staff practising handling and delivering the U.S. nuclear bombs don't look good for all nations that were invaded by Germany in 20th century.

And Happy New Year!

[0] https://ieer.org/article/science-for-democratic-action/volum...

Yeah no shit. Remember when the Soviets operated nukes in Cuba? It's the same thing now, but we're pretending we're not at war with Russia.