I have a Muslim friend from Africa who immigrated to the US because he was persecuted by his Muslim brothers for not being radical enough for Islam. Oddly enough, he took a Christ like approach with them by turning the other cheek.
So, no, they are not all bad people, but you have to understand that these people are trying to practice a religion based upon the example of one man, Mohammad, who was essentially a second-class warlord who married a 9-year-old girl and who converted with the sword and viewed women as second class citizens. This is a man who preached jihad against any perceived injustice. Well guess what, injustice flows 24/7 in every society, but now people have a religious justification for taking up arms and killing because of it.
This is why every Islamic dominated society suffers from the worst terrorism in the world.
Always remember, Mohammad preached tolerance to other religions, but that was when his power and beliefs were the minority in a given society. But once he gained the majority, he took up the sword and converted people or heads rolled.
This is why immigrating Muslims seem Ok at first, but when they gain the majority, the only option becomes Sharia law and all the fun that comes with it.
All of them will follow Mohammad example because Mohammad is their religion.