Second, Anti-abortion people are ok with causing significant harm to women and see their lives as less valuable and not worth protecting.
This isn't an argument about whether abortion is moral. Please don't bring this down to an object-level argument about abortion - I have zero interest in that. This is about the psychological states of groups who believe in the presence of an urgent moral crisis.
Being against (what you believe to be) murder should be very easily distinguishable from being in favor of whatever flavor of welfare program you're thinking about.
So, applying that consistently, if you believe that fetuses are people, the question would be - are you ok with people being able to make legal ("state-sanctioned") choices that result in the death of other people? And of course we all are ok with that to some degree - driving is legal (40k/year dead in the USA), as is gun ownership (30k/year), as is deregulating the EPA (unknowable but large numbers of cancer deaths), and climate inaction (unknowable and growing numbers of climate related deaths).
As must be frequently pointed out, well over half the deaths by firearm in the US are not the killing of other people, but suicides.
Of the killing of "other people", I'd wager a minority of those are associated with legal ownership - prior surveys of inmates in the US in prison for gun related offenses (not just homicide) show a great portion (40+%) obtained the gun used for the offense from an illegal source.
I'm guessing this representation of illegal ownership goes up when you filter for just homicide offenses (the killing of other people) and when you consider whether the possession itself was legal, even if obtained from a legal source.
Manslaughter or the killing of other people outside of homicides/suicides are in the low single percentage digits of the total figure.
The reason for the trigger pull, it turns out, matters quite a bit to people.
Abortion is not something that you have to deal with daily, whereas food (other peoples', your own) is.
But, it would make sense perhaps, if many of the empathic vegetarians would also be anti-abortion too.
Depends on where your empathy goes. You also have to consider the life of the one carrying the foetus, and the life that a being that is not yet sentient would get if it were to live. I don't see any inconsistency with being vegetarian in that respect.
Refusing to eat mussels but being supportive of abortion would seem inconsistent, though... As well as being fearlessly against abortion while enjoying a piece of a cow one in a while seems very inconsistent, if you set aside religious believes.
> convenience of lifestyle / avoidance of responsibility at the most callous
That was also what I was thinking of when I wrote taking into consideration the life of the unborn child. Being undesired or a burden isn't really giving someone the best chances of being happy and fulfilled. But then again, we can come up marginal cases.
"and the life that a being that is not yet sentient would get if it were to live"
I don't know that I think it's not sentient, nor that it is not yet alive. I recognise that might not accord with scientific opinion, but there it is.
Anti-abortion people believe that there is presently widespread systematic mass murder of babies. Regardless of whether or not you agree with them, you must concede that this is a very terrible thing to believe. Certainly worse than the effects of agriculture on animals, unless you are deeply misanthropic.
Anti-abortion people are not nearly as depressed as people who don't eat meat.