I think of how Paul says to rebuke the sinning, before all.
what about folks with personality disorders?
"And on some have compassion, making a distinction;" (Jude 1:22)
We would not do it in order to intimidate and henchman people into conforming. But if someone is making a major project of criticizing the leadership and church and doing it openly, and strategically doing things to interfere and promote one's own self > my opinion is the open rebuke would serve to notify the church that we are not going along with the person and the person does not represent the church, and to notify the person that we do not consider him or her to be representing Jesus. This would be more for someone who is in your face with trouble making. But someone in the back seat suffering because of sinning would be visited with a back seat quiet conversation, possibly.
"nor as being lords over those entrusted to you, but being examples to the flock." (1 Peter 5:3)
First, then, of course, would need to be our example; then, when we take on a wrong person, the person has already had opportunity to get to know our example so this already has been exposing how he or she is wrong.
What you call personality disorder and how to minister to a troubled person can be a subject for another thread. It would depend on each person.
In general, my opinion is we all need compassion, for our sin problems >
"He can have compassion on those who are ignorant and going astray, since he himself is also subject to weakness." (Hebrews 5:2)
Any of us have personality disorder because of what we demand to have for our own selves, selfishly and unhumbly. Our ways of reacting to not getting our treasure pleasures can have any of us getting upset and downcast and nasty and acting more or less crazy. So, if we deny ourselves and take up our cross daily (Luke 9:23) and say no to dominating and controlling emotions for pleasures, this can help a lot; and get into how God's love is gentle and quiet >
"rather let it be the hidden person of the heart, with the incorruptible beauty of a gentle and quiet spirit, which is very precious in the sight of God." (1 Peter 3:4)
God is not silent and distant, but quiet.
So, we can trust God to make us deeply quiet in sharing with Him, and this is in His almighty spiritual and emotional soundness. So, we pray this for everyone. Only God is able to change any of us, like this. Treatments and talk therapy and medications can help someone get some control of oneself, but it is apparently well known by professionals how physical drugs and talking can not actually cure personality problems. This, I understand is because physical things can not cure our character to become like Jesus and make us
all-loving (Matthew 5:46) like Christ on the cross >
"And walk in love, as Christ also has loved us and given Himself for us, an offering and a sacrifice to God for a sweet-smelling aroma." (Ephesians 5:2)
Many have not been dealing with this, and so ones have become deeply weak and unhealthy in other pursuits. But God is able to correct and cure any of us. Jesus suffered and died on the cross with hope for any and all of us to be saved
and safe in His
"rest for your souls" > Matthew 11:28-30.