What misunderstanding do you think they have? Producing embryonic stem cells requires destroying an embryo. Yes, the embryos are mostly castoffs from fertility

What misunderstanding do you think they have? Producing embryonic stem cells requires destroying an embryo. Yes, the embryos are mostly castoffs from fertility clinics and would likely be destroyed as medical waste anyway. But that doesn't matter one bit to people who believe embryos are human beings and deserve legal protection.