Now do it for all the other confounding variables. This is why social science is hard and requires a lot of statistical analysis.
I'm not making any claims one way or another. All I'm saying is knee-jerk assumptions based on a simplified mental model probably isn't a good idea unless you have the data to back it up. (Especially true on complex systems like human value systems).
Group B: College Educated + Rural
Group C: No post-secondary + Urban
Group D: No post-secondary + Rural
Fairly simple analysis to do, and I suspect (as I think you do) that the trend will align with a split between A/D vs B/C not A/B vs C/D.