The dichotomies are always rationally solvable, but we are hardwired to loathe compromise on moral issues.

I think it is possible to interpret my comment is saying something bad about conservatives and good about liberals. However, what I wanted, rather, was to make the point that we (as liberals or liberal rationalists) need to think about taking group binding moral foundations as seriously as conservatives do, because if we dismiss them as outdated evolutionary vestige, that will definitely not solve social and political polarization (which in the US, at least, is at record levels).

What "taking seriously" should mean I'm not completely sure. But I think it starts at understanding and using what is known to work while attempting to avoid the known pitfalls (much like the OP suggests). And as this comment thread demonstrates, that seems to be a bit of a tightrope.