Violence is in decline, this is well-documented across multiple fields such as history, archaeology, economics and sociology. As many others have proposed, you should read Steven Pinkers book, but be aware it is sometimes hard to stomach for instance when describing medival torture. Here is a popular lecture which should give you an idea:
http://www.ted.com/talks/steven_pinker_on_the_myth_of_violence?language=en
What is your evidence (i.e. not intuition or sole events) that violence is on the increase?
With respect to the OP, no, I do not believe there is a God like the christian God. There are several reasons for this, primarily that I do not think there is are any good reasons why a god should exist. The best reasons why a god exists (such as those given by Dr. Craig) boil down to appeal to metaphysical intuitions we have no way of knowing are true or not at the present time, since we would never accept that something existed based solely on an unverifiable intuition, I don't see why I should accept a God exist based on this evidence.
On top of that there are contrary evidence. For instance it could have been the case that science and archaeology verified the major events in the OT; as it happened we know from science there was no flood and evolution explains the diversity of life thereby knocking out the pillars of genesis 1, and biblical archaeology has for the most part disproven the major events in the OT up to around the Babylonian exile. It is important to stress that one can, like the expensive defense attorney, begin to explain these findings away one by one by appeal to miracles, satan, conspiracies and the odd piece of data which is not yet explained, but the bigger picture is science could have verified the bible but turned out to disconfirm it.