I have judged no one. I am entirely competent, and any faithful, orthodox Catholic is entirely competent, to point to mortally sinful behavior and say that this puts one in danger of hell. What I cannot do is crawl inside the head, heart, soul, and intellect of someone who is living in outwardly mortal sin, and say that they have full knowledge and understanding, and that they have full consent of the will.
No, but I can seek to
know why, by the reasons they give, they choose to live in objectively mortal sin. I am not in the least bit offended if someone asks me to give my defense of some behavior that they could point to, and ask me how I justify it. It could serve as a kind of fraternal correction — I am a sinner and if I sin openly, a fellow believer isn’t out of line to call it to my attention. Sometimes I’m just “busted” —
“yep, you got me, that is wrong, I shouldn’t do that”. With God’s grace, I will correct myself going forward.
It is very, very important for contemporary people (at least in this country and culture) to be able to claim that anything they do is good, to feel good about themselves, and to think that nobody really sins or goes to hell except for really, really bad people like Hitler, Stalin, or Charles Manson. “Self-esteem” is the coin of the realm, and obituaries uniformly state that the deceased is now in heaven. In such a culture, reminders that mortal sins of the flesh, sins that many people persist in and live in, can have horrible eternal consequences aren’t well-received.