[nobodyandproud]

I’ve answered elsewhere, but note that conservativism isn’t one and the same as the Republican party; nor is it the same as the evangelical crowd.

But tl;dr; answer: Modern abortion has its roots with a founder who was also strong advocate for eugenics.

She was a product of her time and really believed she was advocating for improvement of society, but the ideas took a dark turn.

The only notable opposition were from the conservative religious circles; but as noted even there the record is spotty.

Still, credit where credit is due.

Whether more modern evangelicals are rooted from the same opposition is irrelevant.