No, annexation is illegal under the UN charter, of which Russia is a signatory, and wars of aggression are criminal in and of themselves. I’ll condemn the illegal annexations performed by Israel and other states, and Russia’s annexations fall under the same boat.
To be even more clear, I do think that Russia would have won fair referendums in Donetsk, Luhansk and certainly Crimea. I doubt that would have been the case for the other two oblasts. Still, all of those annexations were illegal. Just because the neo-cons have flouted the UN charter in favor of the ad hoc “rules-based order” doesn’t mean others should.
Looking at this International Crisis Group’s list of donors:
As well as various Western European & gulf state governments, billionaires and billionaire-founded NGOs. Of course they’re coping: their backers were hoping to get a piece of PDVSA.