Have you studies the Quran? I ask because I don't know the context of the passages you referenced. As another poster demostrated you can paint a very dark picture of the Bible if you ignore the wider context, the big picture. So to understand those passages, you must understand the context in which they appear.
Personally speaking I don't think that the Quran matters. Even if it taught Muslims to be loving, forgiving, and tolerant. The plain truth is Muslims are brutal to non-Muslims, when they are in power.