Paris attack was the most heinous crime and barbaric acts of terrorism. It is not acceptable in any way to mass murder hundreds of people who are unarmed.
I personally think that the world power should intervene in full-scale and get rid of IS.
It would be the only way to bring peace back to the Middle East and the world.
This is 21st century. We cannot tolerate barbarism which allows beheading, burning people to death, and striking a non-military airplane.