I wonder why white Protestants are more likely to be pro-choice than white Catholics, but the opposite is true for Hispanics.
Does protestant include evangelical? If so then I bet most protestant hispanics are evangelical while many protestant whites are mainline protestant.
This is absolutely the reason. If you look at that chart, white mainline and white evangelical protestants are presented as two seperate groups but are lumped for the hispanics (probably due to lower sample size).
Also I believe that just like with muslims, their black sample is probably way too pro-choice which is why the Southern states are so far away from conventional wisdom on that map. This study seems to have a black sample that is less than 20% pro-life whereas polls from Gallup and Pew as late as 2020 have that number closer to ~35%. This is why states like Georgia, North Carolina and Virginia in particular seem way too pro-life on this map.