Mother of 4,
we are entering into dishonesty territory.
You simply DECLARE that a zygote is a "human being" and then use that as a tool to badger me with the GENERALIZATION of "selected, superior classES of human beingS hav[ing] rights while other, lesser human beings may be freely slaughtered for the convenience of those who do have rights." Conveniently, this invokes all sorts of dark and sinister insinuations.
I respect that you consider a zygote a human being but I expect you to also respect that BECAUSE I do see an essential differences between a zygote and an essentially viable and sentient embryo I would not IN GENERAL differentiate between selected, higher classES of human beingS (note your defamatory plurals).