It's pretty hilarious how nearly everything you listed as if they're contradictory points actually come together rather comprehensively to support the thesis that Russia is having to fight a belligerent NATO. And the one item that doesn't fit wasn't ever claimed by Russia to be a reason for the conflict.

I seem to have lost track of why he’s invading.

I don't know what anyone can do for you to cure your confusion when you can't even connect the dots between the very things you are linking.