There are ethical systems which establish objective morality without recourse to a god. See contractarianism and desiring amongst others. I don't claim these are true, but they are to be preferred over a supernatural explanation, just because of parsimony.
Secondly why would morality be objectively true if it came from a god. Surely that makes it gods whim and subjective to that whim. Xtian shave failed to sketch out what it means to say god is intrinsically good, the locus of moral values, so what!
Lastly one could equally construct an argument for good based on other universal truths about human civilisation, even though they are less pleasant. It proves nothing just like the moral argument
1 if objective and universal revulsion of human shit exists, god exists
2 revulsion of human shit exists
3 god exists; conclusion
Secondly why would morality be objectively true if it came from a god. Surely that makes it gods whim and subjective to that whim. Xtian shave failed to sketch out what it means to say god is intrinsically good, the locus of moral values, so what!
Lastly one could equally construct an argument for good based on other universal truths about human civilisation, even though they are less pleasant. It proves nothing just like the moral argument
1 if objective and universal revulsion of human shit exists, god exists
2 revulsion of human shit exists
3 god exists; conclusion
"I still say a church steeple with a lightning rod on top shows a lack of confidence"...Doug McLeod.