Why in the world is going against the secular moral codes of others actually wrong without God? Many times in history and in more than a billion cases going against the secular moral beliefs of others has been called the highest act of valor possible. The Wehrmacht's secular moral codes should have been opposed with bullets. Were we wrong to do so? If my secular moral code was that everyone should worship me your system would make you wrong. If Stalin had taken over the world and enforced everyone to adopt his secular morals or killed them. By your standards it would have been wrong to resist his purges and gulags'.
You did not tell me why something was actually wrong. You gave me the basis for a group's not preferring it occur.
Let me try and save you some time. Some of the wrong tactics are to indicate something is against popular opinion, something is preferred, something is detrimental to human flourishing, it feels good, etc.... They won't work.
Your argument above is at it's core a popular opinion argument. If X is against popular opinion it is wrong. To show how bad of a standard that is if used it would have condemned Jesus, Gandhi, and Martin Luther King, but would have approved of German socialistic race superiority ideals within Germany. It does not work as an intellectual foundation and it would actually produce evil in many cases.
Please try again.
Prove any act what so over is actually wrong without God.
You would save yourself a lot of time if you just admitted as most atheistic professors do that moral truth without God is an illusion or unknowable.
MORALITY AS AN ILLUSION
IS MORALITY 'NO MORE THAN A COLLECTIVE ILLUSION FOBBED OFF ON US BY OUR GENES FOR REPRODUCTIVE ENDS?' [1] (Ruse1986)
MORALITY AS AN ILLUSION JUD EVANS - ATHENAEUM LIBRARY OF PHILOSOPHY
In short, society defines whatever it believes is right and wrong. That is, of course, value relativism where nothing is right or wrongabsolute morality doesnt exist according to Dawkins.
The interviewer noticed this, and when prompted to respond Dawkins replied Whats to prevent us from saying Hitler wasnt right?.
More on Dawkins and Morality-No absolutes | Frames of Reference
In a universe of electrons and selfish genes, blind physical forces and genetic replication, some people are going to get hurt, other people are going to get lucky, and you wont find any rhyme or reason in it, nor any justice. The universe that we observe has precisely the properties we should expect if there is , at bottom, no design, no purpose, no evil and no good, nothing but pitiless indifference. As that unhappy poet A. E Housman put it:
For nature, heartless, witless nature
Will neither care nor know
DNA neither cares nor knows. DNA just is. And we dance to its music.
Atheist Affirms Existence Of*God | With All I Am
Or one rung up from this moral nihilistic insanity is Harris's (neuroscience) claim that objective morality does exist but admits he has no source for it but simply assumes it.