It really is not as complicated or nuanced as some posters describe.
Just possibly, you might want to consider the fact that thoughtful posters can disagree, and more, that you might be simply wrong on this. I see no obstacle to a Catholic insisting that their government endorse public policy that is blind to their own religious beliefs. Any number of Catholic candidates have said as much. The principle of separation of church and state will sometimes disadvantage your own faith, but more often, it protects it against the oppression of others.
Imagine if it were illegal to teach the actual age of the earth in schools or the actual origins of the human species in order to privilege a religious belief. This is not hypothetical.
This has happened, and has been
attempted again as recently as 2005.
But given that Biden seems willing, ready, and able to proactively support abortion …
And this isn’t a mere difference of opinion. It’s simply false.
Granted, if it were the case, you’d have a good argument. But, to the contrary, and to the best of my knowledge, even the most ardent supporters of choice do not proactively support abortion. No one likes abortion. To wit, no one, to my knowledge, though there might be exceptions, has ever said, “I’m bored today. I think I’ll have an abortion. That’ll be fun.” Abortion is never seen as a positive choice. But sometimes, the alternatives are worse, and that’s why so many people who nominally or even religiously oppose abortion for themselves support choice for others.
A pro-life position that seeks to promote public policy that diminishes the negative consequences of continuing a pregnancy to term would reduce the number of abortions the best way, by guiding the free choices of others to the choice you’d prefer.