The Ukraine is front door to Russia, a well-used path of invasion both from Russia and to Russia. There is no way that Russia can allow NATO to squat right along its border in the best spot to invade Russia.
Fair enough. Another issue.
Like I said, the issue is too complex for me to have a valid opinion. Well except this: I dont think there are any good options. We just need to find the least bad option. And I simply do not trust the Biden regime to do that.