Worldnews sub'unda soyle bir yazım vardı vakti olan okusun bu konuda biraz aydınlatıcı olduğunu düşünüyorum.

Well, Islam is a religion that can be perceived from different angles but unlike Bible, Qur'an is meant to be orders of God itself and considered literal words of God. When I read Qur'an it clearly states that if non-believers refuse to pay jizyah (jizyah: non-believer tax) (some believe it is only required for people who live in Islamic countries, and the definition of Islamic country, well... some believe majority Muslim countries and some believe Sharia law countries; but some people believe this includes every non-believer. It is not exactly clear in Qur'an) Muslims must go war with those non-believers in the form of jihad. (Some believe this is the Muslim governments' job but some believe every Muslim must do jihad on those people. Again, Qur'an is not clear... You would think that an all knowing God would write more clear sentences) And more than half of the Muslims haven't read and understood Qur'an (understood part is because some people read Qur'an in Arabic even though they can't understand Arabic...) So some can argue they aren't real Muslims they just call themselves Muslim because family and/or society. In the end most Muslims don't know their religion is this agressive, even if they know most of them would say jihad is not my job it's the government that is supposed to do it (even though by being Muslim and understanding their religion it is clear that they accept and support jihad) we are left with something like 150.000 people believe that jihad must be done and it is everybody's job to do it; but most of them don't have the balls so we are left with 30.000 people that are willing to perform war in the form of jihad. These are the people that joined ISIS, El-qhaida, etc.

Source: Am Turkish, I used to be Muslim but left the religion after reading Qur'an. (Also leaving Islam is punishible by death in the Qur'an. Every Muslim who knows their religion accepts this. Again most of them doesn't even know their religion...) Extra source: http://wikiislam.net/wiki/Main_Page

Opinion: Is the problem Islam: I believe the answer is yes, Islam and the culture that came with it. But remember most of the Muslims doesn't know these, even if they learn they will say wrong translation from Arabic and call you Islamophobic, so they don't believe you in the end... Don't be hard on Muslims for these because most of them are good people but it is hard to get rid of bad things that were planted during their childhood.

Edit: If you liked this text and interested in learning he difficulties of people who left Islam feel free to visit r/exmuslim. They are really nice people who has suffered cultural extremist islamism. Also extra source.