The IRA taught them how to build bomb belts and truck bombs. Cell phones were invented in the United States. Using them to detonate a bomb can be figured out by any school kid. Sawing off heads has been going on for as long as edged weapons have existed. Certainly long before 400 AD when Muhammad used his poison pen to cobble up the koran.
Mohammad was born 635 AD. He was illiterate. He never wrote anything. The koran was, contrary to the lies of Muslim clerics, not written down for hundreds of years later, after Ishaq completed the one and only record of Mohammads life and sayings. You might say it was Ishaq who wrote the Koran. Before that, it was passed along from memory, and we know just how well that works.