Sorry, but where did I claim that? The law was introduced because of man's DEPRAVITY, what part of that do you not understand? It was also already said in the OT that a new covenant would become established, doing away with the old laws. How is that the equivalent to "err well err your god fucked up!"
Also, there are indeed times in the bible where their God changed His mind. A good example is when Abraham pleaded with God that he must find 10 righteous men instead of 50 should Sodom be destroyed.
As for your extremely vague statement "hurr hurr god said go kill people," you should read the book "war in the hebrew bible a study in the ethics of violence"
http://wordandworld.luthersem.edu/content/pdfs/15-4_Nations/15-4_Niditch.pdf - the number of dynamics in biblical warfare is more complex than I think you're even beginning to willingly look into.
And your last somewhat reply-worthy statement, kind of failing to remember where in the bible it says that the earth is only a few thousand years old when Judaism alone we can only trace it back with physical evidence a couple thousand years. I take it you're one of those people who Google "evil bible massacres" hoping to find every little "loophole" he can find to support his own argument.
Unfortunately for you, you're attempting to draw a conclusion that isn't there. The New Testament doesn't support what you want to pretend the bible supports, the closest you can get is biblical warfare. There are no parallels between Islamic DOCTRINE and biblical DOCTRINE.
Lastly, I asked for Sharia law to be justified as well as to search that page for "Jews." Thank you.