What is your problem with Islam? Think about it

[Fake Messiah]

So if you discovered it was from God and knew it to be, you would interpret it like the extremist terrorists. Again, tells me more about you and them, then it does about the book.

Even if you approach it, as you say, thinking that it's from god there are still two interpretations of it. The Quran contains numerous verses of prescribed violence: amputation of hands for theft, the slaying of polytheists, eternal torture and hellfire for vocal disbelievers, and so on. But it also contains peaceful verses urging believers to care for orphans, provide for the poor, and treat others well. Meaning like the Bible and other holy texts, the Quran is full of contradictions.
Those that approach it as the perfect, infallible word of God have powerful defense mechanisms to see it as "good". Some simply deny the presence of any contradictions outright and go to great lengths to interpret contradictory verses in a way that makes the violent verses seem peaceful, bringing what they see as some consistency. More often than not, these are distortions, not interpretations.

Also there are those who read the violent verses much more literally. They may employ traditional, recognized techniques of Quranic exegesis such as naskh, using the more violent verses from Muhammad's later life in Medina to nullify the more peaceable earlier verses from Mecca.

Of course second group is the most dangerous, but it isn't because they chose a more violent interpretation of the religion. It is because their approach was much more plausible. If you focus on the more violent verses, the contradictions are much easier to reconcile. Here's why: The good things in the Quran are not unique to Islam. Giving charity, being kind to others, and not stealing predate the Quran by centuries. From Confucius to the Greeks people wrote about it.

The violence in the Quran, however, is relatively unique to Islam or to the Abrahamic religions in general. Muslims who revere concepts like jihad and martyrdom don't have to jump through hoops to reconcile the peaceful stuff with the violence the way apologists do. This is for two reasons. Violent interpreters see everything they're doing as good. To them, feeding a hungry orphan is at par with eliminating the blasphemer from their ranks. Both actions, to them, serve to make their society more righteous, and are pleasing to Allah. They simply believe that the prescription to do good only applies to like-minded Muslims. They are to execute apostates and adulterers in their midst for their sins, to enslave Yazidi women, and to slay the polytheists. But they are also to ensure that their own orphans are fed, the believing women protected, and the poor given their due. It's actually quite simple. The fighting verses are about how to deal with the outsiders and the sinners; and the benevolent verses about how to deal with their own. No contradiction.

This is one of the only way that a Quran, seemingly full of contradictions, can be deemed both infallible and consistent, making it both plausible and compelling. And that's why it's dangerous.