We need liberal door knockers like Mormon missionaries or Jehovah's Witnesses. Kind of a joke, but seriously what other methods are proven to spread ideas and beliefs?
Sure it seems like lots of work and slow going, but do people believe enough to put in the effort?
The idea is to expand experience for these communities that are 95% white, rural, and don't interact as much with the rest of the world. I think it would get some tread as you can see that a lot of these people are, at the very least, curious. I don't think it would be faced with downright hostility, no more than what religious proselytizers go through and possibly less.
Focus on connection of being human, facing and sharing the same struggles, give a face to what is unknown and demonized.