To mean well doesn’t mean we know well. We are responsible to search the scriptures and let God show us His truth. God will not let us off the hook if we believed a lie that someone else taught.
In Matthew Jesus said, "Beware of the false prophets, who come to you in sheep's clothing, but inwardly are ravenous wolves” Matthew 7:15-16 (NASU).
It is our responsibility to sort out those that know the truth from those that think they know the truth. Much of what looks like God isn’t God. Remember Jesus was gentle and meek and never self seeking.