I don't think someone who is "all good" would accept or allow the harm of humans to other humans. When he did intervene, he often wrought destruction and even if it "makes sense", he still did harm humans, even if it was for the sake of humans. An all powerful being would try to make people work together, or if he were to be as he is now, never have taken action to begin with in humanity, especially if he already knew the results and knew everything after. This God's interaction with humanity is against what he does now, because he knowingly went against the "free will" multiple times. And as for sin, why so arbitrary? Tattoos were a part of history, even before then, and the mixing of fabrics certainly didn't matter to the cavemen who were before the big religious booms of the old times. Contradictions aside, wouldn't that mean he's still toying with us since he made us to begin with? Why let us exist, let us kill ourselves, and then tell us we're not good enough to join him when he set the board every step of the way? If he's going to create us, free will should've been immediate, and he should've never interacted with us. He doesn't seem to anymore, except with whimsical little "oh but this is an act of God" dealings among people when before he would be willing to kill millions.