It’s a religion of conquest and it employs a variety of successful tactics. That’s why, 1300 years later, we are still being conquered by bits and pieces. Unfortunately, advanced technology might be adding to their advantage, especially with the help of clueless leaders of Western countries.
They're not clueless. Just taking orders like the satanic meat puppets they are.
Nothing advanced about it. Anarchists were using explosives to terrorize people a century ago. We're being attacked because we let these barbarians into out countries. Deport the islamists we have and then lock down the borders and the rest can be hunted down without much trouble.