Something I emphasized once to a religious person I know, which seemed to be taken well in their case at least, was that whether you believe in a specific religion or not, it’s undeniably going to get influenced by the society it exists within. The reason I bring this up is, maybe Jesus was a real person and was terrible, maybe he was a real person and was akin to a socialist but various interpretations of Christianity over time have warped what he said and did to make him look like something else, maybe he wasn’t a real person and is more of an amalgamation of figures and influences from the era. Whatever way it goes, people still have to choose what they’re going to support as okay or not okay right now and they can and should have a say in what their religion is like if they’re going to be a part of it. Otherwise, they are deferring a senseless amount of authority to the supernatural, akin to being something like a slave to it. Even religious teachings will often say that stuff happening on Earth is tainted by human “flaws” in some way - that’s going to include teachings themselves! When people cede power to an institution run by human beings and then believe that the institution is actually being magically run by a god somehow, they are just ceding power to other human beings with some denial involved. The institution should serve the needs of the people, in other words, not become a tool of justifying their oppression.