I understand that Christians can hold a diverse understanding, opinion, and interpretation regarding some topics. Also, that there are some fundamental essentials that unite those who hold various views in Christ. Some churches teach doctrine which is contrary to my belief and I hold that they teach in error. These are differences that have nothing to do with salvation as described in Scripture. Others hold views that I believe are erroneous while advocating a certain amount of separation from other Christian churches – but do not actually teach doctrine that would be contrary to one being saved or assume salvation as exclusive to their own denomination. Lastly, some teach heresy and another gospel altogether while assuming the stance of “Christian.” My question is, at what point does a church become something other than a church? When is it no longer Christian and what doctrines are essential for salvation? (My assumption is that a local church is an assembly of believers gathered for the worship of God).