If the USA does not defend all NATO nations NATO is worthless.
The Russian Empire should ask itself if Estonia is worth turning all Russian cities into nuclear ash?
Maybe Estonia should decide to not repress their minorities. If everyone there has the same rights and freedoms,,, nothing starts in the first place.
But Europeans treasure their right to smash down on every ethnic minority group they can. (while treating the USA to endless assaholic lectures about how badly we treat minorities)
If NATO does not step up and join in, instead of leaving it to the U.S., then it's also worthless.