Doubling down on tribalism won't save us from their ignorance. The degradation of a unified society by means of Us vs. Them thinking is how we got here in the first place and how things continue to get worse.
There are those at the fringes of that style of thinking that can be reached by those of us who are adjacent to them (via family, mutual friends, workplaces, etc.). Those folks at the fringes can reach those adjacent to them. We'll never get 100% of them on side but we can at least weaken the well-funded machine that continues to keep them uninformed by relating to people as human beings instead of stoking division like oligarchs intend for us to do.