Funny that this time this started from the right side of the political spectrum.
If you think you have the best idea, the natural next move is to force everyone to follow that best idea, no room for disagreement or alternatives.
This pops up everywhere, everywhere ideology is involved in decisions.
Stalin, Mao, Castro, Hitler- they were all 'idealists.'
They were in it to improve the human (or some subset thereof) condition. And they weren't going to let anyone get in their way of making things better!
It is worth a watch https://www.youtube.com/watch?v=kf-bSAnW_E0 but it itself is a somewhat simplistic take.
Which is why they all failed.
I bet it's related to the tendency for narcissism where you believe that you alone have all the right answers.