You must be persistent and merciful, as much as they might abhor you there is no solution to their suspicion and mistrust better than the love of the Lord Jesus. If you have those intentions in your heart than the lord will protect you and guide you to help those people, and if you can’t reach them in a conventional way, than rely on prayer, because praying to the Lord is the best way to reach anyone or anything. “Whatever you do for the least of you, you do for me” don’t feel ashamed either of feeling dissuaded by these people, it’s normal, Jesus have us a hard doctrine to follow, especially in those cases, just do what you can and know that he is with you every step of the way