If you knew nothing about the intricacies of political and cultural leftism, and you saw only the effects it has on people and places, you would declare it the most destructive force on the planet.

I know about the intricacies of political and cultural leftism, and it is the most destructive force on the planet.

I'm not exaggerating. Destruction from within, i.e. self destruction, is the most complete and total form of destruction. And when that destruction is held as a virtue, and those who would defend from it are branded as the enemy, there is nothing at all to prevent it from laying waste to everything.