Call it arbitrary if you wish but I can pick and choose from any "objective" religious moral lesson. I think the fable of the Good Samaritan is a good moral tale. Rise above the bigotry of your culture and help a human being who is in trouble. I think human sacrifice and killing your own son for the bad behavior of others is sick. My moral landscape has been shaped by more than iron age tales of brutality.
God thinks it's fun to confuse primates. Larsen's God!