Yeah this is not complicated. Republicans got away with having super unpopular positions on abortion for years because voters knew the courts would never let them do it. Now that the voters have to actually deal with Republican abortion positions, Republicans lose.One very narrowly specific poll does not validate your claim. Most Polls showed only around 30% supported the Roe v Wade reversal.
A normal party would see this and move to the center but they can’t because through the primary system the party is captured by the crazies.