War-like God

Samuel 1
Samuel, makes god look like a warrior cold blooded one, his statements sound like if he wanted revenge and blood. It rather reminds me of the Spartans who are also great warriors. It sounds to me that the god I know is completely different from the god I know read. He is cruel, vicious and he looks forward for war. Our god or at least the one I have learned about is more caring and he is “against war”. This is weird for me. I now have a different point of view of what god is. I had never being Christian read the bible until now and I am enjoying it.
It could be that after the humans having so much wars we decided to stop if maybe god said that war is bad. God encouraged people to go to the crusades to kill in his name as Nicholas Machiavelli once said “the end justifies the means” that is what god practically said, what about world war two, killing because god said we needed a pure raze. Maybe God is our excuse
We use him, and blame him for so many things, even though as the Ten Commandments sate we shall not use his name in vane. Have you heard about the crimes committed now days because God spoke to them please! What world are we living in! Maybe god is different for all us and we can have different perceptions.