Modern Religious Extremism

Modern Religious Extremism
Modern religious extremism is arguably rooted in faith based natural law. Natural law is a philosophical "higher law" that is theoretically discoverable through human reason and references to moral traditions and religious texts. In fact, most religious texts have passages that can be selectively interpreted to encourage extremist intolerance. To religious extremist, it is God's law that has been revealed to- and properly interpreted by- the extremist movement.
Answer:
-Is faith-motivated activism a constructive force for change?
-At what point is character of faith-motivated activism become extremist or terrorism?
-Does faith-based natural law justify acts of violence?
-Why do religious traditions that supposedly promote peace, justice and rewards for spiritual devotion have so many followers who piously engage in violence, repression and intolerance?