His quest for truth pit him at odds with his family, founding members of Hamas.

As a Palestian boy, Mosab Hassan Yousef hurled stones at Israeli tanks and ran from bullets on the West Bank. But misgivings about the intifada arose when he saw Hamas leaders torture fellow Palestinians in an Israeli jail.

“Those people I was hoping would bring justice, happiness to earth by creating a global Islamic state were torturing their own people. They were suspicious that someone was giving information to the Israeli interrogators,” Yousef said in a YouTube video.

“They were torturing their own people without mercy, much worse than the Israelis. One question arose, why do I hate Israel for torturing me and why don’t I hate Hamas for torturing their own people? What my enemy was doing made more sense than what my family and closest friends were doing.”

During his jail sentence, Yousef…