If judgment is reserved for God, how can we justify judging each other?

Don't confuse "Judging" with "guiding " or "correction" of a brother or sister Christian....Actually, we are obligated and committed to correcting our brethren when they are led astray...If a Christian Brother claims to have the Holy Spirit dwelling within them and you know for a fact they are a practicing Homosexual, adulterer, fornicator, thief, murderer, It is your obligation to tell them about their sin(s)....