Islam a Religion of Peace
America also invades countries out of "self defence". Self defence is a matter of perception and not everyone has the same definition of it.
Humanity will always have belief in gods.
If there was no religion, humanity would find other tools to enforce control. The Question is, why do humans choose Religion and therefore god as that tool, how do you even get the idea of a "god". It's the limitation of our perception of reality that makes us create an explenation named god.