On principle, I support pretty much any separatist movement
The idea that a country should intervene militarily in order to “save” a group of people isn’t one based on honest, good-faith altruism on the part of the country that wants to intervene, if it were, then wouldn’t we be in a constant state of war everywhere?
I don’t see how you can hold these two positions simultaneously. If part of a country wants to leave, and the government of that country says, “No, and we’ll use force to stop you,” and another country says, “Hey, seperatists, we’ll support you,” then where do you stand on all that? You’re pro-seperatist while being anti-supporting seperatists? That doesn’t make any sense, you could look at just about any successful seperatist movement and see that they recieved foreign backing from someone and that it was likely a crucial factor in winning, for example, French support in the American revolution. This foreign support is generally less motivated by altruism and more by the assisting nation’s geopolitical goals, but it’s all the same to the seperatists who need it to survive.
To me your stance is coming across as, you support the seperatists, but also they should’ve backed down immediately when Ukraine used force to avoid a war, but in that case it seems like you don’t actually support the seperatists in practice.