I understand that it looks like that, but I believe most of the FP evangelists are just too excited about the cool tech and want to share it with everybody so everybody else can feel the joys of functional programming. At least that's why I often mention and talk about FP to other devs.
In my experience growing up as an evangelical Christian, the proselytizing has very little to do with wanting strangers to “share the same joys of Jesus Christ”.
