The problem is you stopped learning history, the last decades of the 20th century showed that a dose of totalitarianism works. China and Singapore showed the world that democracy is not the only basis for for peaceful and prosperous societies, laying the political foundations for this Asian Century.

When does it ever stop at a "dose"? The OP is right; an understanding of recent history would remind people of a lot of things:

1) Times are fucking good right now, add up all the terrorism we freak out over and you have a half hour during World War II.

2) The atrocities against civilians by Whites and Asians was far worse than what a few Arabs are doing now and had a lot more support from the general population.

3) Fascism requires worship of the state and that makes war inevitable.

This!

You must be joking.

Did Romania thrive under Ceaucescu ?
Russia under Stalin or Lenin?
Did China under Mao?

Communism ranks in the same league then Fascism: All boils down to one idiot and his echelon that entitled themselves to brainwash a whole population so they can removes unwanted elements under false pretexts because: Our great leader will show us the way.

They are each others reason to exist. The oldest trick in the book. Divide and Conquer.

National socialism or social nationalism always includes physical violence. Both preach a violent revolution as the road towards them.

Not that democracy is perfect, in theory it is, but make humans responsible for a large hierarchical system and be sure that it will be infested by corruption that concentrates in the higher echelons and gradually extrudes all real assets. When those are gone debt is created until debt is no longer sustainable and the democracy confiscates your assets to pay for the debt created, through 'austerity'.

Anyway, not that it matters much, humans will do what they naturally do if unchained for all of the above. They share, congregate, exchange and transact and do that perfectly without the need for some nation state system that registers, regulates, bags and tags everyone for optimal taxation. This site is a perfect example of it an initiatives like this and other Agora's , either on the clearnet or the darknet.

What does ‘peaceful’ mean in this context.