Yes, but it's also a fact that no one likes a mirror held up to them when they're dirty.
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You're not paranoid if people are actually trying to kill you. And if a person is objectively holier than thou art, can you rightfully disparage them as "holier-than-thou"?
And it's a fact that those who have Pharisaical and judgmental attitudes also don't like that mirror to be held up either, in many cases moreso that others who have other faults, given that pride is the predominant fault. Those who labor under other sins are sometimes very well aware that they are not living up to the right standard.
As for your last statement, absolutely one can call out someone who is "objectively" holier ... in some respects ... for a "holier-than-thou" attitude. Those Pharisees our Lord rebuked in the famous parable of the Pharisee and the Publican did in fact keep the law much better than the publican, but it's a question of ATTITUDE. All of the saints, who had true holiness, considered themselves to be the least holy of men. That's often been a point of discussion. Was that false humility since it was clearly objectively false, and humility is truth? No, they considered themselves the least holy because they had an acute awareness of their own failings, knew which graces they were offered and didn't live up to perfectly, etc. ... while they granted their neighbor the benefit of the doubt. Perhaps they received fewer actual graces for some reason, perhaps were born into difficult circuмstances, had tendencies from their natural temperament that perhaps inclined them to certain faults, perhaps had tons of circuмstances and prudential considerations and other obstacles that prevented them from living as they should all the time. ONLY GOD can judge souls at that level. We can only judge objective right and wrong.
So, yes, it's perfectly fine, depending on the situation, when motivated by true charity, to point out when people aren't living up the standards of holiness, either to help correct one's neighbor or else to encourage others to avoid those faults.
Nevertheless, pride is the most difficult and deadly and insidious of all the sins, the devil's sin, which is why Our Lord was so harsh with the Pharisees and relatively gentle on the heretics (like the Sadducees) or the Samaritans. To these latter, He pointed out that they were in error, but rarely used the strong language He employed against the Pharisees for their hypocrisy. You can count on one hand that the Lord rebuked people for erroneous beliefs, whereas the Gospels are filled with His denunciations of hypocrisy and Pharisaism.
And the devil attacks Traditional Catholics who live well with the temptation to pride, and a temptation to look down their nose at others who do not compare to them with respect to some virtues.
You can go ahead and denounce immodest dress or other aspects of Traditional Catholic behavior all you want here on CI, but for the most part you're preaching to the choir. But we all must remain vigilant against pride and against being judgmental. We know not what graces others have received, what their temperaments are, what their temptations are, what their circuмstances are.
But there's an extremely BLURRY line between pointing out a defect with the proper motive and looking down our nose at these others, and the devil knows how to manipulate it very easily. We must remain ever vigilant against this fault.
Speaking of how insidious pride can be, how many people when listening to the parable of the Pharisee and Publican, even if very subtly, identify with the Publican and, in a manner of speaking, think, "Thank God I'm not like that Pharisee." See the irony and how quickly the devil can twist things. When listening to that parable, we all need to be vigilant against giving even the slightest foothold to pride, and we need to focus on how and to what extent we ARE just like the Pharisee. All but the greatest saints have at least a small current of pride that the devil is always ready to exploit. As soon as one begins to think him humble, that immediately becomes an occasion of pride. We have the clear example of Mr. Humble himself, Jorge Bergoglio, who prides himself on his humility and promotes it at every turn, deriding those who are not as humble as he. But the devil works much more subtly than that on most people, so that he can gradually slide them into a bad place without their even knowing it.