If morality is universal, this speaks more to it coming from God than not.
Not true. First off you haven't even defined God in order to attribute anything to such a thing. You may as well replace God with He-Man since he is the Master of the Universe.
Morality isn't "universal" as in the same for everyone, even on issues where there is a big majority in agreement, such as the murder of children. Even though the vast majority of us accept that such a thing is wrong, there are still child killers out there indicating the morality on this issue is not universal.
The reason most people do agree on big issues like this is primarily because of our Evolution. We evolved to hold things such as murder, rape, and theft to be wrong because it served an evolutionary purpose, an evolutionary advantage to our survival.
If we evolved to favor discord, murder, destruction, etc in our morality, how would we ever have survived as a species? Much like the lone wolf dies on it's own whereas the pack together survives, our social ancestors had a distinct advantage over "soloists" because they worked together. Those of us who were naturally more favorable to working together had a better chance of surviving long enough to procreate. If everyone was a soloist, opportunist, murderer then who is to say we'd ever have survived our environment? Perhaps those that were naturally more discordant did live yet did not survive thus their lineage dying out.
We still see morality in nature with animals. The male lion who leads a pride of females gets to mate and the weaker males are banished. The females stick with the alpha male. Their loyalty is a form of morality. Wolves also have their own form of "rules" where the alpha's eat first. Primates have their own societal rules.
Morality is tied to evolution. If there was no morality then we likely never would have been able to work together to overcome our environmental challenges, such as the Ice Age. Teamwork and cooperation was a huge part of our ancestors being able to survive during difficult times. Of course they will develop "rules" against a deviant trying to disrupt the social order that serves to help everyone survive.
Christianity teaches that saying I'm sorry for the same sin over and over again is ridiculous, and this is the opposite of repentance. (Which is necessary for forgiveness)
Society soon learns that a dishonest apologist is not to be trusted. We don't need Christianity to teach us to learn to differentiate a meaningless apology from a true apology. We also recognize the benefit to everyone to be able to forgive. Forgiveness existed prior to Christianity.