That's where you're making your biggest mistake. I don't have to come up with an argument for human rights, I only have to recognize them. I don't have to understand how gravity works to break a hip if I fall down the stairs.
I don't have to come up with an argument for human rights, I only have to recognize them.
And yet, you are unable to separate the fact that you were raised in a theist society which honors human life, and where you learned the 10 Commandments, and the Preamble to the DOI, and have seen ethical behaviors instituted by our theistic society on many levels. Indeed, you needn't explain them since you cannot or won't; just recognize them and adhere to them as you undoubtedly do.