There are also many who are willing to listen. Much better use of your time and you won't feel so much frustration trying to engage those who are not yet ready.
Ever heard the saying, "You can lead a horse to water, but you can't make him drink."
I applaud your efforts and tenacity, but the energy you have expended on reaching out to someone who is not receptive is energy that might have helped educate 2,3,4 or more people who ARE ready.
Best of luck in all you do. Keep fighting the good fight, despite the occasional set-back.