So you think it would be OK to live under Taliban rule? They didn't come into power by democratic elections, it seems.

Also, killing people with beliefs does stop beliefs from spreading. How much of Afghanistan do the Taliban control these days, anyway?

I'm sorry but your explanation makes no sense. Oil is wherever it is located, so you have to go there if you want to take it or protect it. But you can grow poppies in most places. It makes no sense for the US to spend something like a trillion dollars and thousands of lives for something they could grow in California or Texas.

In fact we actually grow opium in Australia.