Again, this depends on the metric you use and what standards you apply. Most Catholics are physically indistinguishable from the average protestant, so no, a cop is not going to pull you over for being a Papist. However, in many Evangelical sects, interracial marriages are increasingly common, while marrying a Catholic, you may as well be consigning your soul over the devil, for sale by Luxeswap.
Dude..Alabama didn't official repeal its law banning black-white marriages until the year 2000. They did a referendum on it. 40% of people voted against repealing the law: