Hamas supporters protest AOC, Bernie for not being pro-Hamas enough

(JNS) — One of the ways to tell apart moderates and extremists is checking the brakes. The other is the constant infighting. And the two are connected. Extremists have no brakes so their movement is always going to new extremes.

In my book “Domestic Enemies: The Founding Fathers’ Fight Against The Left,” I quote a telling line about the French Revolution.

“‘As the revolution becomes radical, the Right disappears, and the Left of one assembly becomes the Right of the succeeding assembly,’ Mignet explained, describing how each new political incarnation became more radical than the last. ‘The Lef...