But this fundamentally is not an ideological or religious or foundational question, but an empirical question.

As with other empirical questions, once we manage to muster sufficient courage to want to ask, and resources to actually ask, there is no reason for the schism to be any more persistent than the schism over heliocentrism. Instead, we just learn some psychology and cognitive science: humans are this plastic under those circumstances due to these genetic factors and those social factors.

While our definitive knowledge is hardly satisfying at this point, we already have some pretty good answers which are being resolutely ignored (by both extremes of the culture war, in this case). But eventually one can hope that the weight of evidence will be so great that what seems like an unbreachable foundation now will be a stale old partly-wrong idea that we believed when we primitively didn't know any better.