I actually believe they are blasphemers. Some think that they were really Sephardic Jews that knew where the treasurers hidden during the sacking of the second temple were hidden. There is also some evidence that they were knowledge about kaballah type teachings. Someone carved a proto tree-of-life into the prison walls for example.

Fun Fact: The templars forced k
KIng John to sign the magna carta under threat of "regicide".