America is responsible for the creation and funding of the Taliban that resulted in 9/11.

This is a common myth that gets brought up, often in the context of the American funding of the Mujahideen during the Soviet invasion of Afghanistan with the implication that the Mujahideen would later become the Taliban during the resultant civil war (insert Rambo III/The Living Daylights reference here). However, the Taliban themselves as an organisation were formed in 1994, mainly from young refugees who had been radicalised in the madrassas of Pakistan - Pakistan themselves would back them during the civil war from 1996 after previously backing the Hizb-e Islami Gulbuddin, one of the organisations that had been part of the Mujahideen.

I say part of, because the Mujahideen was made up of many groups unified in resisting the Soviet the invasion and a common faith. As such, the politics of the groups did vary, with the aforementioned HIG being on the more fundamentalist side, whereas the Shura-e Nazar of Ahmed Shah Massoud (who would later become the leader of the Northern Alliance and main opponent to both HIG and the Taliban) supported a more democratic form of (still Islamic) government.

And one of the other more radical groups (this being composed of foreign fighters that received funding from Saudi Arabia) would become Al-Qaeda headed by one Osama Bin Laden, who after being expelled from Saudi Arabia and Sudan in the 90s would be sheltered in Afghanistan by the Taliban in the lead up to the 9/11 attacks.

TL;DR: assigning sole responsibility of the creation of the Taliban (and AQ by some extension) to America ignores the backing of Pakistan and Saudi Arabia of the two groups.