Peter, when being confronted about the Gentiles, does the simplest thing. He doesn’t give a big theological case. He doesn’t try to rationalize Gods actions. He just tells his story.
You have a story. It might not be as flashy as Peter’s story was, but you’ve still got one. When God calls you out and sends you to do something to help reach the lost or show love to others, you’re not called to defend it. You’re just called to respond and tell your story.
Who needs to hear your story?