What's your answer to people who proclaim things like: a) Ukraine has a right to self-determination, b) Putin has moral agency, c) NATO is necessary to protect

What's your answer to people who proclaim things like: a) Ukraine has a right to self-determination, b) Putin has moral agency, c) NATO is necessary to protect states that wish to turn away from Russia, d) What about the wishes of Ukrainians? In the context of the US antiwar movement? Most leftists, even those that have deep mutual disagreements with each other, have long held that NATO expansionism is harmful. But I've been seeing a lot non-leftists use points a-d) to argue that the leftists are wrong. Have you seen this and how would you resolve this? My own answer has been that NATO is kind of like a road system. Stop building so much and polluting our forests and lands. But if there's an avalanche, it is ethical to use the road to evacuate people. But I still feel I don't understand it fully and I'm not sure what ought to happen or what ought to have happened between NATO versus any country in a situation like Ukraine's.