god of old testament and of new testament...!!!

The only God has to change according to peoples mentality and behavior.

God is God...One God. This may be hard to grasp because it doesn't follow human thinking. But basically, whatever God does is right and good. EVERYTHING He does is for His glory. He could take on human form and go around on a killing spree and it would be good because He is God and He ultimately defines good. Now He would never do that because he loves us, but if He wanted to, we would be in no position to object. But basically God=good. God feels emotion as we do. We are in His image. In the Bible, Moses has to plead with God several times not to destroy Israel out of wrath.

I agree also with samson. God needs to explain himself so that his listeners will understand.

God in the OT is the same as the God in the NT. In the OT when one reads of a nation being wiped out, the Bible says that it is a judgement upon those people for their sins. For example, we read God telling the Israelites to wipe out certain people. But we also read that God gave them time to repent, and they did not. So God judged them. And when Israel sinned and failed to repent God judged them too. Even in NT times God will judge in future. Some may face judgement even during their life here and now.