Novel teachings about how everyone else is wrong should be subjected to three tests.

1. Does it align with what Yeshua said or did?
2. Does it align with what God spoke through Moses?
3. Does it align with what God spoke through the Prophets, including the Disciples and Paul?

And our interpretation of the Prophets must align with Moses, which must align with Yeshua. If a shiny new teaching contradicts Yeshua's teachings or life, then it's wrong.