Quinault has given the longer expanded sentiment behind Matthew 7:5
Thou hypocrite, first cast out the beam out of thine own eye; and then shalt thou see clearly to cast out the mote out of thy brother's eye.
I think we -all- need to be careful about pointing out the sins of others, even ones we believe are such obvious sins. This is my personal opinion, but to me, the louder and harder that we continue to do such things, the smaller and smaller the beam in our own eye seems to us.
Our righteous indignation over the sins of others, makes us start ignoring our own, because 'this can't possibly be as bad as THAT', and we stop trying to repent.
Would you say the same thing if someone condemned a sin?
if we were discussing it without pictures and because someone ASKED the question of 'is this a sin?'
if that were the scenario here, then no, I would not.
Discussing that lying is a sin....is a drastically different prospect than showing a picture of someone, saying they are a liar and then trying to re-abstract the discussion away from that person.
By the very nature of having -shown- people precisely WHO you mean when you continue to discuss how much lying is a dreadful sin, you are judging the person, not the sin.
And since I myself am a sinner, I have absolutely no right to go around calling other humans sinners. My particular sins are between me, God and my Priest, just as yours are....
I do not feel that this changes just because the other party is not Orthodox.