I recently heard of a priest preaching on the Feast of the Holy Family that Jesus did not know that He was God and the Mary and Joseph were bad parents as they were partying on their way back from Jerusalem hence forgetting to take Jesus with them. How 70s! The sad thing is that he was likely taught that non-sense and believes it in good conscience.
But, this reminds me of another story of historical-critical preaching. It seems that a priest, preaching on the Feast of the Holy Innocents, proclaimed that the Holy Innocents did not really exist, but were mythological. After Mass, he tripped and broke his arms. The joke among his confreres was that the babies were getting even. A few years later, a different priest preached the same drivel and wouldn't you know, the same thing happened. Don't mess with the babies! (I imagine that the same lesson could be well applied to the Holy Family.)