Yes, the choices are moral choices. But by calling it arbitrary, I presume you mean: "Based on random choice or personal whim, rather than any reason or system."

If they are without reason or system, then the can hardly be derived from existing moral systems (that, is morality), or the application of those moral systems to (and lessons learned from) historical circumstance (history).

But by all means carry on with your aggressive point-missing. Would you care to pick this particular nit? Or perhaps a different one?