There is no deceptive teaching,it is only the those who elevate their personal beliefs or have been deceived that are deceptive.
As Blessed Bishop Fulton Sheen said...
"There are not more than 100 people in the world who truly hate the Catholic Church, but there are millions who hate what they perceive to be the Catholic Church."-Bishop Fulton Sheen
Having lived at the time in the USA the bishop had a right to his opinion, however wrong it was.