The God of the Old Testament is a jealous, bloodthirsty, vicious God that mercilessly commanded horrific attrocities like, for example:
Killing every human on the planet except the handful that went with Noah.
Moses commanding his people to shed each others blood as atonement for creating and worshiping the golden calf
The genocide of the people in the promised land when the Hebrews finally ended their 40-year stay in the dessert. Under the command of God, they wiped out whole cities, killing every man, woman and child.