It's pretty clear the the god of the bible appears to be two completely different deities in the two testaments, and liberal Christians seem to discount the OT version in favour the the "God of Love" version found in the New. But how did the NT god manage to get such an unwarranted reputation as he's quite insane too.
Frankly, in my opinion the NT Yahweh is far more insane and dangerous than the OT version. Yes, the OT god was very murderous, including the wholesale slaughter of children to punish and/or test their parents, but he would leave it at that. Not like the NT deity who figures it's just punishment to torture people forever because he didn't like the way they think. It's no contest!