Why does this “marxism” of yours sound so much like fascist discourse with its dislike of multinational states?

Name one single reference to fascism, or fascist state, or fascist propgandist quote that ever suggests dissolution of a state.

And since when are federations bad, what’s up with that?

Federations are fine, neither Ukraine nor Russia is a federation. Federations are voluntary and can be left at any time. The last time a state tried to leave either Ukraine or Russia they got invaded and bombed by their ‘federation.’ Because ‘it wasn’t really democracy,’ and ‘the vote was rigged.’