Could you meet in a non-parenting setting (meal out, coffee without babies, cinema?) and not talk about parenting so you all have a chance to remember why you were freinds to begin with? If they're going through changes with their practices maybe they're just trying to find their new path and can't yet defend/discuss their new tack yet..? It might take the pressure off and let them see you're all the same people, whatever choices you make.

Bx