[Surely you are not equating the Taliban and their war fighting ability with Germany which at the beginning of WWII had a modern army, navy, air force and most importantly, a well developed industrial base.]
* It wouldn’t even have to be the entire population. Alexander needed to live off the locals. He killed masses of people as an example to the survivors, and the rest fell into line in order to be allowed to continue existing.
Alexander is an excellent example to make an excellent point!
But, practiically not very helpful.
There’s been a few thousand years of advance in counter-insurgency tactics. It’s not just a matter of mores, but success. As you say it takes a little longer.
Typical of today’s mehod is the yrian/Russian “descrimanate” (barely) bombing of rebel areas.