Are you saying that opposition to HBD is a core value of liberalism? Really? Given that virtually every white person was a little bit white supremacist a century ago (and maybe that is still true), and prominent progressives were actually eugenics supporters, this seems unlikely. It's more that opposition to racial differences being politically important has been spread among liberals, but in many cases this is fairly unthinking opposition, and based on the false belief that science hasn't found any such statistical differences.