@Metaright "Until both sides start addressing each other's actual arguments"
Really, no.
The entire anti-abortion thing has been wrought from nothing, for the express purpose of working up conservative voters. Like the anti-drag thing, the anti-'woke' thing, etc.
The 'actual' argument on the forced birther side comes down to whether a person capable of being pregnant has bodily autonomy. That side completely denies this. You simply can't have a rational argument with people who want you dead, injured, or tied to a life with children you don't want and/or can't afford. Who think scooping out a clump of cells with no independent thought or existence is worse than an 8 year old being forced to bear a child to term, an adult dying of sepsis or giving birth to a 'baby' incapable of survival or a life free from pain and severe disability.
Their argument basically comes down to "Kinder, Küche, Kirche". Keep women barefoot, pregnant, and uneducated.
@Metaright "The way to sway a pro-lifer, then, is to demonstrate that a fetus doesn't have personhood."
No, first you have to persuade them that the life of the fetus bearer is worth something more than being an incubator.
Which you will never do.
People who are anti-abortion fanatics may or may not believe that a fetus is a baaaaaby, really. But what they really do not believe in is the personhood of the placenta owner.
And until you find a way to convince them that a real, living, breathing human being with feelings and rights who already exists independently has rights, including that to life unburdened by an unwanted pregnancy for any reason, you won't convince them of anything else.