awooga83 Yep this standpoint has become a particular lens on the conflict. It is a relatively conservative, right wing, "hard-nosed" view that sets aside right and wrong in its analysis of great power motives.
There are high stakes for Russia in the demand that Ukraine be protected by NATO's Article 5. The war has made these stakes even clearer. As we've seen and every Russian can see, Ukraine is struggling to sustain its campaign exactly because NATO military forces can't and won't directly join its lines.
The question "did NATO expansion cause the war?" belongs to 2022 now, what's relevant is understanding Ukraine will be forced into long term neutrality.
The war has been disastrous for Ukraine and humiliated Europe. It should have been avoided if there were any way to avoid it. It's killed hundreds of thousands, consolidated Putin's control of Russia, and it has achieved the United States' and not Europe's objectives by alienating Russia from the EU.