We are all created in the image o f God and as such, we all have an inherant knowledge or right and wrong, of what is and what ought to be.
This is plainly obviously wrong on so many levels. If we all had an inherent knowledge of right and wrong, we wouldn't disagree on it so fundementally. The vikings didn't feel guilty about raping and pillaging, radical muslims throw acid in the faces of school girls without remorse, the crusaders tortured thousands in the name of god, and they all thought that their "inherant knowledge of right and wrong" was guiding them to do so. In the civil war era, the bible was used to both condemn and justify slavery depending on the side of the debate. Today, it's used to both condemn and justify intolerance of gays depending on which side of the fence you're on. Morality is defined by the culture it belongs to, there is no "inherent" sense of it. You can't even get people to agree on whether or not it's right to kill people. At best you can get the majority of people to agree that it shoudn't be done indescriminately. That's the inherent morality of god instilled? You probably shouldn't kill people indescriminately? Powerful stuff god, thanks for that one. We definately wouldn't have figured that one out.
Trying to justify it only leaves you with some kind of tautology at best, and a lame platitude at worst. "We all have a sense of right and wrong, except the one's who don't." or "we all have a correct moral sense, but some get it wrong." or even more lamely "we have a moral sense inside of us, but we have trouble listening to it."
Objective means it's the same regardless of the observer, or one making the measurement. Morality is not objective by any standard. And simply claiming that the implications of that are terrifying does not some how make it less true. Yes, tomorrow eating babies could totally be moral. At the drop of the societal hat, raping can be justified. Hell, god's people slaughtered infants by the thousands and celebrated it, they took women from neighboring nations and forced them into "marriage". We are always on the razors edge of agreeing that something terribly harmful to people is moral, and that is scary. But the world doesn't need a philosophy that says "reality looks pretty damn scary, let's believe in something more pleasant." It needs a philosophy that recognizes our perilous circumstances and works damn hard to make our existence work. No, we don't have an objective morality that's just going to guide us to do the right thing. We have to work hard, educate ourselves, consult lessons from history, meditate on our lives, and if we are lucky we may fuck over the people of the world less than the generation before us. What isn't going to help is assuming that because we are filled with magic, our decisions will work out for the best, if only we listen to the ineffable unicorn living in our heart. That's lazy and daft.