It doesn't matter. How eloquent you are. How many times you explain and how right you are. It's true as Marcus Aurelius rights, you can talk until you're blue in the face, but they'll just keep on doing it because it world without selfish or ignorant or unreachable people is impossible. And from time to time. We are going to bump into these people. Can you come to terms with that or are you going to let it drive you crazy? Is it going to make you better or can you be happy reaching the people you can reach happy standing on the common ground with the decent folks who are willing to gather with you there and who knows maybe eventually belatedly the others will come around and it's not in your control if they do or don't so you can't worry about it.
A World Without Selfish or Ignorant People Is Impossible — Accept It