I think you’ve misinterpreted that sentence. The ISI was one of the original supporters of the Taliban (hence the expression “sowed the dragon seeds”).
I understand. You can always point to particulars here and there. This group did this. Another group did that. And that action caused the next action.
But what I’m saying is the Taliban is a direct outgrowth of the Koran. If not named the Taliban, if not directly assisted by the Pakistani military, it would have arisen under some other name, by some other proximate cause.
Hate-filled Islamic extremists are not a new phenomena born in the 20th century.
They weren’t new in the 10th century.