I don't think one can accurately define let alone understand a whole group of people by picking out the actions of a few and then making them all abusers and monsters. There are various reasons why one believes and acts the way they do, and they themselves may use a blanket term like pro-life and each have a different way of defining and acting on what they consider a value rather than focusing on the individual they're using "pro-life" toward or against.
Shawn Shatto's parents, for example, were frustrated that SS's influence overrode their own. They were trying to get Shawn help via treatment, and didn't want to give up on treatment as the answer for Shawn...but Shawn did.
I was pro-life for decades based on the pain and trauma I experienced when a boyfriend committed suicide without any warning signs. My response to that was to focus on my pain, and to use that to shut down any conversation about suicide. Some people just parrot the dominant social beliefs and phrases like a child parrots what their parents believe without any direct experience.
It wasn't until I got free of a lot of codependency beliefs and behaviors that I started accepting people, accepting them having their own experiences and thoughts, and just listening, not trying to interfere in their shit, not taking it on or taking it in, accepting I didn't cause it and didn't have the power to cure or control it. I could listen to someone who was suicidal and show compassion, and feel good when I walked away that they felt better for having talked to me, even if they didn't come to a decision or decide on any course of action. Realistically, most people can't do that. I'm not special, I had to do a lot of work to get to that point, and I didn't know I would end up like that. In the old days, I would have shut down such conversations, guilt-tripped, shamed, suggested/demanded psychiatrist/psychological treatment because I bought into those paradigms of power, called a family member or the cops, etc. I really thought I was doing the best thing and being helpful. I hadn't learned that interfering can cause more harm to the one who's suffering; I did it to someone, I've had it done to me, in both cases abusing and controlling people who one would think of as helpful made the situations worse. I've learned.
My old beliefs and actions weren't because I was a monster. I was doing what I thought was ethical, and sometimes ethics and self-protection seem to one to justify harmful behavior, to hide that it's harmful. At the extreme, ethics can justify isolating and beating a wife or a child, being a terrorist, genocide, manifest destiny, etc.
Being "right" and righteous is dangerous and harmful. If we think we are "right" about pro-lifers, we head down the same path they're on. We want to be understood, but because we're not, we tend to not seek to understand, either. I say from experience, and not on a high horse, that identifying as a victim can lead to some really shitty, abusive, harmful behavior. If we see pro-lifers as monsters and not equally fallible and limited humans, we risk becoming monsters. We risk going to extremes out of our self-identification and frustration, such as trying to do maximum psychological damage with our suicides. We head toward becoming emotionally violent and potentially even more unsafe than those who act unsafely toward us. It is, to me, far worse to harm than to be harmed (Seneca); saying the harm is justified is, to me, doubling down and reinforcing helplessness and giving more power to the power that harms us. I know it's not any easy struggle, I know we're in shit positions, I swear I'm not judging or shaming anyone here, I'm just concerned about what the self-righteous mantle of victim can create underneath it.