Not just some element of truth.
It’s a DIRECT ANALOG.
One group of people treating another group of people as less than human and therefore disposable. Direct analogy.
The NAALCP is just upset because they want perpetual victim status and this is infringing on it.
It is worse than that. To say that the mother owns the unborn in her womb is direct analogy of slavery. To say that therefore she is entitled to kill the baby is analogy of legally killing a slave for her own convenience. That is something that, I am sure, most 19c slaveowners would cringe at the thought of.