Russia is already in that position, so you are already dealing with an assertive opponent who only believe in power. And you got war.
So I'm not saying that Putin's rhetoric is correct. but it is a fact that it causes war. In Europe's case it's avoidable if you don't go that route.
The sensible thing would be to pull NATO back to more reasonable boundaries and leave the Russians alone. Maybe ally with them to oppose the Chinese or support India against China. Point them East instead of forcing them to militarise to the West.
What actually happened only really makes sense in context of the famous and rather concerning Trump-Biden debate. If that is the quality of the US's diplomatic head then it is easy to explain why the US policy went so far astray.
Without NATO more countries than Ukraine and Georgia would be at risk of war with Russia.
Russia is not going to ally with the US against China even if we let them rape and murder Ukraine to their black hearts content. They want to dominate Europe and share the values of our authoritarian adversaries.