Why would Christianity unravel if there are ETs? doesnt compute.
Christianity would unravel with ETs because they would be dying and could not receive the Gospel because they are unrelated to Jesus Christ. The reason why Christ can save us is because He is our kinsman redeemer, having been a descendant of Adam in His human nature. Also, Jesus did “once for all” on the cross, so that precludes Him from going to other planets to die for ETs. The whole thing would make the problem of evil unsolvable from a Christian perspective.