It is perplexing what happen to Finns this last decade, I cannot understand. I think it has to be a very well coordinated traditional and specially social media campaign that was able to override 3/4 of a century of pragmatism and wise decisions.
But it is not just Finns, all Baltics and Scandinavians fell for it.

How come Moscow is more than a threat now than has been the Soviet times where they were really powerful and messing with countries right and left, near and f. Once Finland guaranteed no NATO in the 50s, Russia left Finland to prosper like no other country in Europe did... and now, this. Russia has been, for a decade say, year after year, after year... that they would consider NATO in Ukraine as a no-no. It is not just that Ukraine cannot choose its destiny, but that we dismiss Moscow's concerns after being invaded multiple times by the West through Ukraine... a claim they may have! Especially when certain politicians have been mentioning for a decade to partition Russia into different microstates!

Funny enough, after decades admiring the Scandinavians, the most sanity in Europe seems to be in the PIGS countries now. Probably due to their skepticism to governments' propaganda, it is what saved them from the abnormal levels of Russophobia that social media had been flooded with all these years