This does not make the use of the term 'fundamentalist' acceptable for an encyclopedia article in the contexts you keep using it in.  Your use of the term in these contexts is clearly POV.  It is not within your capability to judge whether Hillsong's positions on abortion or homosexuality are or have been 'fundamentalist' just because Houston or the AOG are generally described this way - this is an encyclopedia article, not an opinion piece.  If you want to justify your use of the term in connection with these issues you will need to provide reliable and verifiable sources to support this claim - otherwise the article will need to use more appropriately neutral terms such as 'traditional' or 'conservative'.