I don't deny that The Problem of Evil makes it harder to believe in God. I'd have to say that it's the major problem I have, despite having other reasons for being an atheist. But I'm not saying that Jesus wasn't pretty awesome. I like his Golden Rule. Lots. I don't even mind his commandment to love God. That's why I say his error was to insist that we love Jehovah, because Jehovah is accused of moral crimes that God is actually innocent of. He didn't say "Wait, you think G-d told Joshua to genocide the Canaanites??? Ewwww, no, that's not God." He said "why do you call me good, only God is good". But he was talking about the (fictitious) entity that ordered these murders, not God. It's a moral error.
Loving the Creator and loving the entity described in the OT are different moral commandments.