Peter asked:
"By the way, how do you assert human rights?"
On the basis of reason.
Peter asked:
"In other words, what is your objective moral principle?"
That man has the right to exist for his own sake, regardless of whoever disapproves.
Peter wrote:
"(And don't tell me to just go read a book [although books are helpful]--I want to know what you think *s*)."
You've got it.