That may or may not be true.
However, this thread is not about morality, and I hope the mods will keep that in mind.
This thread is about "rights."
Specifically, about where rights "come from."
I can see why and how some may think the two subjects are intertwined, but look how the thread (about where rights come from) is already being derailed by the other.
In my view/ observations, basic human rights (right to life and self-defense) is something that predates our ideas of "morality" and not the other way around.
What we are calling "morality" is simply an expression of and a logical extension of the basic human rights that we (humans) inherently possess.