Basically: yes. If memory serves, NATO had no excuse to intervene until a neutral investigative team (of pre-NATO Finns) determined that yes, Serbia committed a big massacre of civilians.
I mean their sense of being is the defending alliance. And from their being scared by Russia and unwilling to help Ukraine, we can tell that when Russia would attack Estonia, they will do nothing and invent some excuse why Putin is a good marvellous wonderful guy with whom I’m personally a very good friend. Them attacking Russia first, looks unbelievable. They are afraid to even help the country that was attacked, as they were told by Russians they won’t be happy, and so they obediently do what they told.
Invasion? Oh my, are you delusional? NATO is a defence alliance, stop consuming Russian propaganda maybe.