If God, Jesus, the devil, angels, and demons were all real, we still couldn’t rely on the Christian Bible as gospal (pun intended) — it was written by humans, specifically men, who could have misunderstood or invented things. Think of it like the Snyderverse in Man of Steel: Superman is portrayed as a brooding, violent character — but that’s not his true nature. In Batman v Superman, Batman is straight-up killing people — also not his normal characterization.
So even if much of the Bible reflects real events or real beings, parts of it could still be distorted, exaggerated, or entirely made up by the people who wrote it down.
If you stop viewing Jesus as a deity and start viewing him as just a really nice guy, and you ignore much of the rest of that book, then I think he is a good role model.
Strangely, all of the good things he said and did are ignored by the people that worship him.
Turn the other cheek - nope, let’s blow people up in the ocean just in case they’re doing something wrong.
Love thy neighbour, the story of the good Samaritan - nope, fuck anybody that’s not rich and definitely fuck immigrants.