I agree that we should make some accommodation to basic level questions if the OP seems serious and willing to work with us to make the question more acceptable to the site until what's left is the issue of scoping by denomination.
ONCE THAT IS DONE, to help maintain objectivity, we can have the question tagged with something like
introduction tag which (by policy) requires an answer to include a "version label" representing a denomination, proposed here. See use case description in an answer to the related meta.stackexchange.com question. The suggested tag name is
introduction to indicate basic level questions which should presume an audience that doesn't know much about Christianity.
Until the "version label" feature is implemented OR if the feature is rejected, we can start using the
introduction tag to signal an answer writer to include the "version label" inline in the first line of the answer, which later can be converted to a "version label" once/if the feature is implemented. The
introduction tag description should include the only allowed labels to be used. Answer correctness is measured against the poster's declaration in that first line.
This reduces the need to phrase the question as an overview (using the
comparative-christianity tag) which the OP probably wouldn't be interested in the first place, or which discourages potential answer writers most knowledgeable in only one denomination (which I believe are the majority here). This also gives the opportunity for more answers with other version labels to be added over time (we are talking weeks, months, or years).
introduction tag name is just a suggestion. The key idea is that the new tag should signal a policy for the answer writer to follow, i.e. to prominently add "version label" within the answer.