Basically, that is a misrepresentation of God, and that you really should just stick to the new.

How do you know this? Aren't you basically asserting that God described in the NT is the real God, and the depiction of God contained in the OT is wrong?

Jesus came to Earth to tell us that that God is not the real God, that the real God is actually loving and good, and that we should worship the real God instead.

That may be what the Gnostics believed, but givent ahtt hey were all murdered by the Christians of the time, and that this belief is not the Christian belief, I'm not sure how this is relevant to the discussion at hand.

Jesus never said that the god of the OT was not the real God. He explicitly said that not a jot nor tittle of the law would changed until heaven and earth pass away and that their purpose be accomplished. So far as I can see, the earth hasn't passed away or disappeared, so Jesus kind of explicitly said that not a jot or tittle of the old law would pass.

I agree that he did change a bit the OT laws, but he never wanted to abolish them. People after him declared that he "fulfilled" the law, whatever that means, and they decided that asking people to cut bits off their penis would seriously discourage new converts, so they didn't ask that anymore.

Personally, I take to heart that anything that contradicts "love everyone as yourself" is wrong.

Do you remember that part where Jesus agreed that the Canaanite woman was like a dog scrabbling after the crumbs falling off its master's table? Or how he said that it would be better for someone to have a millstone tied around their neck and to drown in the river than to cause one of the little ones to stumble in their faith?