It’s been awhile, quote me what you want responded to. If you meant “our shared identity self=other” then you’re kind of off-topic. First I want to know which ‘God’ people are referring to. If your God is Jesus Christ, then Christian morality is contingent on treating others as you would be treated, Golden Rule, Human Universalism, yes… but it’s not quite that simple.
Obvious, in the “Human/Hominid” specie, there are races and sub-races which either cannot or should not share living spaces. Some groups are violent, criminal, unruly, low-IQ, and generally chaotic, anti-social, uncivilized… If you expect all “Humanity” to fall under one shared identity, then you must understand Expectations are not realistic.
You don’t treat pigs and dogs as humans, so within humanity there must be designation on exactly who is or is not ‘Human’. What does it mean, exactly? You’ve never gone into that area or deconstruction. Are all human races “equally human”? Obviously not. There are countless ethnic and racial conflicts across the world.
I’ll use the current genocide and extermination of Gazan Palestinians as an example. Israelis and World Jewry, and their Zionist soldiers, cannot tolerate Palestinians living in Gaza, and treat them as Not-Human.
So work on that first.