Most global terrorists can be traced back to one man - Ishmael.... Abraham's first son, who later got kicked out of the family along with his mom.  

Gen 16:12 - "Behold, you are with child, And you will bear a son; And you shall call his name Ishmael, Because the LORD has given heed to your affliction. 12"He will be a wild donkey of a man, His hand will be against everyone, And everyone's hand will be against him; And he will live to the east of all his brothers."

The most notable of Ishmael's descendants is Muhammed.