My proof that God is loving, caring, merciful,compassionate,and forgiving comes from my reading of the Bible and my experiences.
People like yourself who think only THEIR reading of the Bible is correct have plagued us throughout history. They were there during the Crusades, the Spanish Inquistion and the Salem witch trials. They were people who killed their fellow man in the name of God, acts which surely made God weep! Isn't there one of the Ten Commandments that says "Thou Shalt not kill"? Why then would God have bin Laden kill those people at the WTC? If he is as angry at America as you say, why wouldn't he have done it himself?
Your type of religious fervor is dangerous, you only see what you want and accept those inpretations of the Bible that mesh with your own. Anyone else is doomed to Hell. It is people who think like you that DRIVE PEOPLE AWAY FROM GOD!