Imagine two people pray for a sick relative. One recovers and it's called a miracle. One doesn't and it's called a mystery. The same belief survives either outcome, which is a tell that it isn't being tested by evidence but shielded from it.
That's my core issue. Rational justification means your belief could, in principle, be shown wrong by facts. For many believers, nothing could count against God, so the belief isn't a conclusion, it's a commitment. Fine-tuning, moral feelings, and religious experience are real, but they're interpretations with natural alternatives, not proofs. The FOR side has to show the inference is reliable, not just possible.
I'm not saying God doesn't exist. I'm saying the belief isn't rationally justified, because the evidence doesn't uniquely point there and faith fills the gap.