Unjust and unloving criticism of others has been called the 'peculiar sin of the saints'. In fact, it is the most glaring vice of 'holy people'. Many who are most emphatic in condemning the doctrine of a 'sinning Christianity' are often most guilty of violating Christ's unequivocal command, 'judge not' (Matt 7:1). This violation is sin.
Increasing judgementalism is actually a sign of decreasing grace. It implies that we do not believe that God is capable of correcting His children Himself. In other words, we are trying to do God's job for Him. The average critical saint has more confidence in criticism than Prayer, to remedy a situation.
A man cannot become judgmental without elevating himself and self elevation is the characteristics of Lucifer. The essence of our fallen condition is self exaltation, the determination to be first. Therefore the willingness to humble oneself and to be last instead of first, is a greater miracle than even walking on water.
A clear indication that judgementalism is always wrong is that it always, without exception, dims one's relationship with God and interfers with one's prayer life. One cannot pray effectively for others while he is judging and condemning them. Someday we will discover that pride of opinion is a greater sin than a supposedly incorrect doctrine over which we have broken fellowship with another.
Therefore do not fall into Satan's trap of judgementalism. But rather choose God's way the way of agape love that covers. Love never fails.