@Syne --
So one tribe of humans cooperating to destroy another is de facto "moral"?
Yes, it is moral to fight for survival(and all fights in that dim age were for survival). Is it
ethical? Maybe not, it depends on the circumstances. However you're arguing against a straw man here because this is not what I said.
What I said is that because humans predate religion, and because the cooperative behavior that is hardwired into us is what even your religion has deemed "moral", morality predates religion. Of course, morality very likely predates humans as well, virtually all primates share most of the behavioral traits that we've come to describe as moral.
You wanted evidence that morality predates religion, well the very fact that humans predate religion means that morality predates it.
Seems equating morality with cooperation is both a consensus morality as well as intuitive self-justification, both of which decried by your referenced video.
They most certainly are, but unlike you I don't make the mistake of equating morals with ethics. I can make an ironclad ethical case against murder, however I can't do that from a moral standpoint because, like it or lump it, morality is subjective to both the standards used and the circumstances encountered.
Now, about the mirror neuron phenomenon you noted. While that might explain a minority of animal behavior, it certainly doesn't explain a multitude of animal behavior that can only be described as "morality". Such as the cetacean tendency to help injured and sick pod members breath and eat so that they can recover. Or the fact that various species of elephant display a ritual treatment of their dead. I could go on, but it's obvious to anyone who knows a bit about animal behavior that you're merely grasping for straws here.
Despite what you might want to think, it's a fact that morality predates religion.