It seems that you're conflating the issue of the discrepancy between the human condition and John's statement that "God is love" with the issue that there should be reconciliation between the demanding Mosaic Law and the teachings of Jesus, unless you're implying that the imposition of the 613 mitzvot is unloving.
Also, to clarify your position, one that rejects, to certain extents, Mosaic Law, you should more fully quote those passages in Galatians that you base your stance on:
"Before this faith came, we were held prisoners by the law, locked up until faith should be revealed. So the law was put in charge to lead us to Christ that we might be justified by faith. Now that faith has come, we are no longer under the supervision of the law."