You're just not putting two and two together. The same US Constitution that protects the rights of persons also protects against unequal treatment under the law. Constitutionally, you couldn't say it's OK to murder a one-celled zygote person but protect others. You'd have to give that single cell the same protection as any other person, and that, my FRiend, opens up a slew of complex legal issues. You shouldn't go around demonizing everyone who voted against this amendment simply because they correctly see the issue as more complicated than what you're willing to admit.
What some people are doing on the thread is focusing on fertilized embryos that were conceived via IVF.
Even though most fertilized embryos live inside the mother’s body.
It’s a disgusting de-personalizing technique.