Even if he's truly sincere, there are still cultural associations with politics. It makes no sense to me that Dims wholly support the party of slavery and segregation that today says blacks are so stupid they wouldn't know what pot to pee in without smart white Dims to point it out. But groupthink among other blacks make supporting Dims seem like the black thing to do. Maybe your coworker from Puerto Rico has a similar backstory. It could be habitual more than anything. I know I'm better off not eating sweets, but I'm tempted to do it because I've done it so much in the past. Some of the professional and Godly blacks I know still vote Dim because they've done so all their lives, even though they know the Dims are probably the most organized anti-Christian group in the U.S. today.
Then there's pride. People get so emotionally invested in politics and spew so much out of their mouths, it's embarrassing to admit to themselves later that they were duped. Even when it becomes obvious to some of them that they've been duped, they're afraid that being against the Dims today is admitting to others and themselves that in the past they were easily fooled by the God denying, baby butchering, freedom sucking, race baiting, anti American, pedo grooming, cow fart warmageddon cult Dims.
You make good points.....It’s weird because the guy I walk with on lunch breaks is Black and from Nigeria. He and I see eye to eye on everything.....So your point at the beginning makes sense “where’s his heart”. His mid might know Christ but his heart is off somewhere else-—but that is not for me to judge.