50% or 60% of muslims are real muslims. other 50% or 40% are doing what they are not supposed to do. That includes terrorists and non-terrorists. And by non-terrorists I mean sinners or criminals etc... Yes, terrorists are sinners and criminals, but other people can be sinners and criminals without being a terrorist.
I find History interesting, and I have always learned about History. Islam has done many good things, but it has done bad things, which caused the deaths of thousands and thousands.
My country's history and world's history taught me that alot of muslims have done very great things, but also very bad things.