unfortunately, my answer to this is hypocritical, given the trump presidency: drag the regressives kicking and screaming into a more liberal future, one step at a time, carrying their dead weight as gently and as gracefully as we can, because it's the right thing to do.
i don't care if it sounds scary: the backward people of the world are our brethren, and we can't leave them behind even though they're inconvenient and ungrateful. they resent us looking down on them, but they have earned it.
it's what we as a liberal society have done for 200+ years now. the conservatives never get tired of losing on the long term because they frequently win battles in the short term.
the march toward enlightenment would be much faster without the dead weight of the viciously tribalistic and the willfully ignorant. but they're humans too, so we're obligated to improve the lives of their grandchildren by working toward a better future today. their grandchildren will be more liberal, and so, we'll have won.
this is a paternalistic view, to be sure. but we've seen how inept the backward tribes are at managing their own futures... and how much effort they expend on trying to ruin it for everyone else. better to let more evolved minds guide the rubes.