It's interesting how this narrative has developed only in the past 40 years or so. At the time of Roe vs. Wade, the Catholic Church did not view a person as being alive until the first breath (a view held today by the Jewish Faith - I've heard they consider the truncated care available to women as an affront to their faith). It wasn't until around Regan that the view really started to change as stopping abortion became a mainstay of the Republican party's policies.
This incorporation into their policies and values is mostly what drove the change in view - going from "it's not a person until it's born" to "fetal personhood". Then after the Dobbs decision and in the leadup to this election, that the phrase murder started being thrown around.
Ever wonder why they're still only prosecuting for the act of abortion, not murder? It's because federal law (which trumps state law) only considers a person as someone who is born.
> they've all collectively decided not to bother trying to seem sincere to those who do not agree with them.
I'd argue that they act quite sincere, and often violently so. Raised voices is the least of what a conversation between a "abortion is murder" and "abortion is health care" tends to result in.