Exploring the Historical Existence of Jesus and Its Implications

Questions about how to help a friend move away from his belief that objective facts about religious issues, unlike scientific facts, are “just someone’s belief” and how to respond to an atheist who keeps dismissing every argument and demanding “verified” evidence.  

• How can I help a friend who thinks objective facts about religious issues are, unlike scientific facts, “just someone’s belief” move away from the fact-value split?
• How should I respond to an atheist who keeps demanding “verified” evidence and dismissing every argument I offer by saying it’s not verified?