A big part of it is how the media portrays the divide. Even the conservatives I talk to have a bit of nuance in their views; they're not Alex Jones screeching about psychic vampire pedophiles.
But the nuance is secondary to herd mentality. They'll support calling frozen embryos babies because it helps their cause of banning abortion.
So, the core issue is still tribalism, and that's not ever going away, given the media landscape we live in now.