You've got a point (I agree) about the monotheistic religions: they are inherently divisive.
Of course, before that, people divided according to blood ties, clans, tribes, etc., so monotheism was in a way an improvement... 2500 years ago, if resources were scarce and tribes were fighting. (If you're on Pandora and the next tribe is a whole forest away, with plenty of luscious food available for all, fine, stay in tribes).
But today we need so much more than, my group is going to Heaven and yours is inferior and going to Hell.
You can keep the afterlife, you can keep notions of eternal consciousness transcending material existence, you can keep the notion of higher wisdom, you can keep flying saucers and ghosts and all that, you can keep reincarnation, you just need to admit all humans equally to your club. Whether in this life or the next, you'd want ALL humans to be treated fairly and equally, and none of this, "we are the chosen ones, y'all are heathens, kaffirs, fallen", whatever.
Maybe you're a sentience which exists forever, OK, so what, you are here now, be nice to people equally.