The law given to Moses was the national legal law, applicable to everyone. You are truly stating what is false.
You will never win this debate because you are against what God Almighty has ordained by his law and his prophets.
“I will be a swift witness
Against sorcerers,
Against adulterers,
Against perjurers,
Against those who exploit wage earners and widows and orphans,
And against those who turn away an alien—
Because they do not fear me,
Says the Lord of hosts.” --Malachi 3:6
“Execute true justice,
Show mercy and compassion
Everyone to his brother.
Do not oppress the widow or the fatherless,
The alien or the poor.
Let none of you plan evil in his heart
Against his brother.” --Zecharia 7:10, thus says the Lord