Could I see quotations about the history of violence? Buddhism has by far the lowest score of violence of all five big religions of the world. Not to mention that when that violence did happen (zen priests blessing kamikazes during WW2, myanmar riots these days...) it has been condemned as explicitly not-buddhist by the wider Buddhist world (for violence has no place in the Buddha's thought).
As for it being a religion, well yes it is, however it is not a theistical religion that explicitly asks you to believe in a vengeful, retributing god.
The Buddha describes how reality works (karma - from a certain action an appropriate consequence will follow, and there's nothing fixed or permanent, just conditions giving rise to other conditions) with the important corollary that if you want to be happy, then do actions that are ethical because "good" consequences will follow from those. This is what we call a "philosophy" in western thought.
It only becomes a "religion" when one believes that one too, could be like the Buddha, becoming something that's much higher than what one is right now. One doesn't have to believe this bit however, one could very well follow the Buddha's teachings (and meditation, which is an integral part of) just to become a happier human being.