"Do not fret because of the wicked; do not be envious of wrongdoers,Although these words were penned 1500 years prior to the rise of Islam's prophet Mohammed, imho, they can be applied today as scathing rebuke against Islamists with their violent ideology of vengeance - and ever more vengeance.
for they will soon fade like the grass, and wither like the green herb.
Trust in the LORD, and do good; so you will live in the land, and enjoy security. Take delight in the LORD, and he will give you the desires of your heart.
Commit your way to the LORD; trust in Him, and He will act. He will make your vindication shine like the light, and the justice of your cause like the noonday.
Be still before the LORD, and wait patiently for him; do not fret over those who prosper in their way, over those who carry out evil devices.
Refrain from anger, and forsake wrath. Do not fret--it leads only to evil. For the wicked shall be cut off, but those who wait for the LORD shall inherit the land."
"Commit your way to the LORD; trust in Him, and He will act."