Being prejudiced would cause a conservative to start creatively trying to defend and defensively explain away and keep away from examination, a large liberal voting block, to end discussing that vote or even republicans and conservatives becoming aware of it, on a forum of politically active conservatives currently involved in campaigns, and in an election cycle.
You are right. Since Catholics, or alleged Catholics, only contributed 17% of Obama's vote there must be another reason you have spent so much time and effort trying to prove your point.
Peace and blessings.