That's right, 'hate the sin, love the sinner' is a MAN MADE saying. It's NOT in the bible.
And personally, Jesus having come from God to spread this message to me even more makes the theory that god evolves with the universe believable. Maybe he felt "guilty" about the things he'd said and had man do up to this point, and so he sent jesus. (Perhaps knowing nobody would accept the message any other way?)
But I also believe in a bigger picture where God and Jesus are but representations of other deity's, all real. (Well, mostly real. Perhaps. )