I see a very sharp distinction between 'morality', as a Real Thing, and normal animal instinct.
Definitions, again:
Instinct: *a largely inheritable and unalterable tendency of an organism to make a complex and specific response to environmental stimuli without involving reason*
Morality: *principles concerning the distinction between right and wrong or good and bad behavior*
Morality and instinct are not synonymous. Instinct is an involuntary response to stimuli, not a reasoned decision. 'Right and wrong' are meaningless factors, in an instinctive situation. You react, instinctively, with no moral question. ONLY if morality arrests the instinct, does an inner struggle occur. This is a Moral conflict, not an instinctual one.
It is morality, not instinct, that tells you to not steal an item you see and want. An animal instinct would say, 'Take it!', with no second thought. It is the moral 'sense' that overrides the instinct.
The same with survival. The 'flight' instinct would cause you to flee from personal danger. But the moral sense overrides that instinct, and invokes courage, for duty, honor, pride, or other intangibles that have no instinctive basis.
Pick an instinct. Almost every one is tempered by an overriding moral decision. Sex, vs restraint. Theft, vs respect for property. Murder, vs Natural Law. A moral 'sense', at times conflicting with our natural instincts, 'reasons' with us, at the conscience level, so we do not respond instinctively.
Morality, as a factor in behavior, is unique to the human animal. All other animals respond instinctually, to their environment. They migrate like clockwork. Breed & hibernate, at instinctive intervals. They steal, murder, & have random sex, with no sting of conscience.
So, the Real Question is, 'What is the Source of this 'sense' of morality? Did an Embedding Force put it there? Or is it a acquired trait, indoctrinated by society or human manipulation?
To assert, 'Evolution did it!!', with no reasoning, data, or logical progression is a leap of faith. Evolution could 'select' traits that enhance survival, but it is an irrational stretch to claim that all moral values seen in the human animal 'enhance survival.'
It is a logical conclusion to perceive delusion, if this is a godless universe. But it is conflicted to claim belief in morality AND 'no God'.