No one ever invaded Russia through Estonia. The last 2 massive invasions that killed millions of Russians were through the border with Ukraine - Napoleon and The Third Reich. You can’t just pretend that every inch of border is equivalent. If you’re going to pretend you know history, at least don’t expose your clear confirmation bias.
But NATO already is on their doorstep. Norway, Estonia, Poland etc. Even USA is only a few mils away across the Bering Strait.
This is not about Ukraine joining NATO, that’s a convenience.
No one ever invaded Russia through Estonia. The last 2 massive invasions that killed millions of Russians were through the border with Ukraine - Napoleon and The Third Reich. You can’t just pretend that every inch of border is equivalent. If you’re going to pretend you know history, at least don’t expose your clear confirmation bias.