Sounds like your liberal partner is about to find exactly the one thing that could be done to turn politics from not relevant to deal breaking.
Honestly, if I didn't know better, I'd think it's deliberate. Knowing better, I think it's a probably a move based on some very weird dynamics that play directly into the Ukrainian victim/martyrdom complex and that in and of itself would be a deal breaker for me. But it can only end in conflict with you looking the bad person. Which means that I would advise you the relationship is now materially on its last legs. You could bring your partner closer to your politics, potentially, but more likely it will not work and arguing won't change anything except the opinion others have of you.
My advice, begin the process of leaving the relationship.