I have no idea what organized terrorism and gun control have in common. They don't really overlap much in reality. Troll topic is troll.
Religion can be merely a tool for controlling the weak minded into doing specific things. Some beliefs are more convenient for spreading chaos and death than others. Dogmas can get bent into all kinds of perversions. Religious extremism: not necessary but goddamn convenient to get and keep people fighting. I would imagine it's pretty easy for someone to create a violent mutation of a religion (a sub-religion if you will) when you have a lot of desperate poor people struggling to get food in their bellies while their corrupt country leaders are swimming in money. Seems weird to put the blame/focus on religion since it's definitely not the only factor. There is corrupt leaders, rebel leaders, religious rebel leaders, the world police, international geopolitics and multiple conflicts following each other or happening at the same time in nearby areas.