In your opinion what causes christians to believe in Jesus

[John 6IX Breezy]

Equivocation. Stars aren't the only light source.

In cosmology, the early universe isn't exactly habitable.

Good, we've disassociated photons from stars, that's progress. What's funny is I think you know exactly how wrong this idea is, that's why you've pivoted to the It-will-kill-you argument. Because I think you know that photons are basically what created the universe in Big Bang cosmology. You don't get to have stars, or any other light source, without photons turning into all sorts of particles.

And lucky us, there are plenty of free traveling photons all around us right now, and no one's dropping dead.