An unwitting infidel.

Hello, dear Rabbi Michi.
Sometimes I come across opinions from Breslov or Chabad revelers who claim heretical things, such as that the rabbis of the aforementioned Hasidism are God, etc. Here on the site they claim that they are heretics and do not join the minyan, etc., etc. But they usually claim this out of ignorance and lack of knowledge of Halacha and Torah. Are they also then heretics and do not join the minyan and their Sat is invalid, etc., etc.?