The following are Our Lord's revelations to Mutter Vogel.
"One should NEVER attack a priest, even when he's in error, rather one should pray and do penance that I'll grant him My grace again. He alone fully represents Me, even when he doesn't live after My example!" (page 29, Mutter Vogel's Worldwide Love, St. Grignion Publishing House, Altoting, South Germany (29.6, 1929)
"When a Priest falls we should extend him a helping hand through prayer and not through attacks! I, Myself will be his judge, no one but I! Whoever voices judgment over a priest has voiced it over me; child, never let a Priest be attacked, take up his defense." (Feast of Christ the King, 1937)
"Child, Never judge your confessor, rather pray much for him and offer every Thursday, through the hands of My Blessed Mother, Holy Communion (for him) (18.6, 1939)
"Never accept an out-of-the-way word about a Priest, and speak no unkind word (about them) even if it were true! Every Priest is My Vicar and My heart will be sickened and insulted because of it! If you hear a judgment (against a Priest) pray a Hail Mary." (28.6, 1939)
If you see a Priest who celebrates the Holy Mass unworthily, tell it to God! He stands by Him on the altar!