NATO is bigger and it has more soldiers and bigger armies, why do you think Russia will invade NATO, it's just ridiculous. :( It is not Russia that is increasing in territories, it is NATO that is approaching Russia over the past few decades.
And the rhetoric that Russia is directing at the Baltic states - and has been for many years now - is largely indistinguishable from the pretext used to invade Ukraine. So those states at least have very good reasons to believe that they are next; and they are in NATO.
This is textbook russian propaganda.
But also, the civilians who got shot in Bucha, and countless others in similar situation, would very much disagree.