I would expect it depends on personal experience. All ideologies have schisms, as you say. The first thing that came to my mind was the local liberal and "mate

I would expect it depends on personal experience. All ideologies have schisms, as you say. The first thing that came to my mind was the local liberal and "materialist" (that is, Marxist) contingents fighting over definitions. (And that does involve a few parents!) But it's equally reminiscent of childhood Catholic versus Protestant conflicts. I only have more recent experience of one to privilege it over the other.