This video by Dr. Charles Blackstock addresses the question of how to share one's faith with others without being offensive. He references the Bible verse of Jude 1:22-23, which says, "And of some have compassion, making a difference: And others save with fear, pulling them out of the fire..." He suggests that a good way to begin sharing one's faith is to ask questions and be a good listener to understand the other person's perspective and background. He advises not to attack their beliefs but to use their viewpoint to help them understand the truth of what Jesus says about dying for their sins and saving their soul. Then, compassionately share the Gospel and express concern for their well-being and eternal salvation.
