They aren’t that dumb. They know Russia won’t gun for them. They’ve been cooperating for over eleven years, not just economically but even politically, with German politicians being put at the head of Russian state-owned companies.
They want the populace to accept a strongman; hence they are making the EU population suffer.
A great example of this is Gerhard Schröder, chancellor of Germany immediately before Angela Merkel. When he left politics he went to work for Nord Stream AG and Rosneft. I think he also worked for Gazprom. No big surprise then that Germany was cozy enough with the Russians back then to become so dependent on them for energy security.
We have an uncomfortably large number of people who numbly parrot the idea that men can become pregnant.
I am not as optimistic as you are about the depths of human stupidity.