***Heh. I find it more baffling than interesting.***
I think that it has a lot to do with pride and hubris. And the association of one with a socially elevated group.
The Calvinists associate themselves with God, identifying themselves as the elite and therefore they are better than anyone else. These lickspittle Pentecostals are associating themselves with the Calvinists hoping that their association with them will somehow bring them elevated status as well.