I prefer to refer to them as recreational Calvinists. For them, their theology is a game, and winning is the only option, even if it splits or explodes churches to bits.
I had two Calvinist coworkers who zeroed in on my being Catholic. It got to be fun; I ask them how Zwingli died (his smashed helmet is in a Swiss museum). They countered that the only true Christian martyrs were those put to death by the pre-Henry VIII Church in England.
Squaring predestination with the evangelizing of others was a little awkward for them. But the zeal of the new convert shown throughout. Churches with sermons less than three hours long weren’t worth attending, they maintained.
I put up a church calendar in my shop that featured classical paintings of the Madonna & Child. Drove them nuts.