Ukraine surrendered nuclear weapons as a diplomatic concession - you can't credibly argue that there's no diplomacy.
With a nuclear deterrent either from Ukraine or NATO, Russia would be less likely to attack.
I'll absolutely point the finger at Russia when they're the one pissing on the diplomatic efforts, tearing up treaties, memoranda, and agreements, and invading their neighbours while threatening nuclear war and committing a bunch of warcrimes - how is this anyone's fault but theirs?
Just like their precious founding fathers intended in the first amendment.
oh.