Lessens from the evolution of the western society after the war:

This is always right in modern times:

A few tiny-brained and politically-active people make the general public unable to make their own right decisions.

We ought not to leave these people any free breathing space. Their stupidity has already gone beyond their own control.

To prevent them sabotaging the right things we are doing, we should not listen to them. And tell people not listen to them.