Why would it?
OR/ Why would it not?
I have always found the moral argument convincing, like a vice that doesn't let go. However, there are problems with it (from a rationalist position), for instance, it does not come close to proving whatever god exist is the God of Christianity. The argument can just as easily be used by a deist, Judaism, Islam, etc.
There is secular morality and there is God's morality.
Without a god, any morality that "exists" is purely subjective and or arbitrary, sets of laws and rules invented by fallible people. Morality dissolves into a choose the flavor you like, the flavor most people like, etc. I think the moral argument is stronger for people with a conscience. Hardened people without much of a sense of morality could care less.
we can treat people who we can see with respect n treat GOD with disarray and how can we treat each other with no love whom we see daily but loves GOD whom we can not
vice versa ,,,...
Seems to me the second half of OP would be a subject for another thread. Assuming the "we" are Christians, well not everyone who claims..but at the same time, we're not God, we're not the moral law giver, and we're all law breakers, even born again, we're engaged in a spiritual war between the flesh and spirit. I feel where you're coming from though, more than you'll ever know.
Anyway, a closing thought, the moral argument fits best in a biblical presuppositional method, in the form of a transcendental argument, this involves strong biblical statements concerning non-Christians, and from them a biblical approach stressing the antithesis between autonomous man and the Lordship of Jesus Christ.