God is the judge

Judge not according to the appearance, but judge righteous judgment. (John 7:24 KJV)

There exists some confusion at times between when to fulfil Jesus’ commandment to “judge not, that ye be not judged,” (Matthew 7:1) and when to “judge righteous judgment.” We are commanded both to not judge and condemn others and to make right judgments—which entails discerning, evaluating, and differentiating between right and wrong.

Not being judgmental doesn’t mean that we can’t or shouldn’t evaluate the rightness of things and measure things by the standard of God’s Word and build our convictions accordingly.

While it’s normal, and at times necessary, to evaluate and reason out the decisions and actions of others and to weigh them on our moral scale, it doesn’t follow that we should then treat people in an unloving, judgmental way, or be quick to condemn others because of the choices they’ve made.
 Only God is in a position to pass wise or fair judgment.

As Christians, we shouldn’t feel compelled to judge every attitude or action of others. We should be more concerned about helping people and loving them into heaven than judging them on earth.

God is the judge; He knows the hearts of people and He understands everything about them in a way that we would never be able to. [1]

I always prefer to believe the best of everybody, it saves so much trouble. - Rudyard Kipling (1865–1936)

[1] Ancora Judging Right Judgment