Luke 20:21-22 "Teacher," they said, "we know that you speak and teach what is right and are not influenced by what others think. You teach the way of God truthfully.
Jesus' enemies said this... they knew what he said was true and they didn't like it. But Jesus taught what God expected him to teach no matter who would like him for it. No matter who's feelings it might hurt. Because it was more important to tell teach the truth than to make friends, keep friends, or not offend someone. One of those truths may have planted a seed, no matter what the person thought at the time, and that seed may have one day grown enough that that person had a change of heart and eternal life!
As Christians we should never be unkind, but we also should never be afraid to speak God's truth no matter what anybody thinks of what we have to say. God's truth is too important to silence!