Don't be quick to judge those still lost in their sin. Remember where you were before the grace of God came into your life.
Titus 3:1-7 says,
Remind them to be subject to rulers and authorities, to obey, to be ready for every good work, to speak evil of no one, to be peaceable, gentle, showing all humility to all men. For we ourselves were also once foolish, disobedient, deceived, serving various lusts and pleasures, living in malice and envy, hateful and hating one another. But when the kindness and the love of God our Savior toward man appeared, not by works of righteousness which we have done, but according to His mercy He saved us, through the washing of regeneration and renewing of the Holy Spirit, whom He poured out on us abundantly through Jesus Christ our Savior, that having been justified by His grace we should become heirs according to the hope of eternal life.
Paul tells us to remember where we have come from. Notice he said to show humility to all men and speak evil of no one. Why? Because we also used to be foolish and deceived and disobedient.
I thank God I am a new creation in Christ, but I still blush when I think about some of the stuff I got involved in before I was saved! Disobedient? Been there. Serving various lusts and pleasures? Up to my eyeballs! Plus all the other things Paul mentions in this passage and a few more!
It is amazing how people in the church forget what they were like before the grace of God came into their life. When that happens they tend to get very haughty and judgmental towards those still lost in their sin. A harsh, judgmental church that lacks humility while verbally lashing out at sinners is one of the ugliest garments you can dress the beautiful gospel in.