In ESB, we see one of cinema history's biggest and most shocking reveals. While fighting on Cloud City, Darth Vader cuts off Luke's hand and has Luke cornered.
Wanting to turn Luke to the dark side, Vader tells him, "If you only knew the power of the dark side. Obi-Wan never told you what happened to your father."
Luke tells Vader what Obi-Wan told him, to which Vader replies, "No. I am your father."
Luke cannot believe it, but Vader encourages him by saying, "Search your feelings. You know it to be true." Luke then steps off the platform.
Why did this news rock Luke to the core? He grew up with his Aunt and Uncle, who told him that Luke's father was a navigator on a spice freighter. Then Obi-Wan tells him that his father was a Jedi who was killed by Vader. Finally, he is told by Vader that Vader is his father. No wonder Luke is confused and overwhelmed. He had been told lie after lie his entire life.
Often many people have the same visceral reaction to facing the truth later in life. They initially deny it as Luke did. They are then overcome by it and need to make a choice, embrace it or run away.
People are being taught that they are good and perfect and that we can believe whatever we want to believe.
Relativism has become the religion of the day.
They reject Romans 3:23-24, which clearly states, "for all have sinned and fall short of the glory of God, and are justified by his grace as a gift, through the redemption that is in Christ Jesus."
We are called to bring the true message of the Gospel to all people. We need not worry about their response. That is between them and God.