Everyone judges, it is necessary for survival. We are commanded to do it. But, there is a way to do it.
Matthew 7:2
For in the way you judge, you will be judged; and by your standard of measure, it will be measured to you.
John 7:24
Do not judge according to appearance, but judge with righteous judgment.”
The word of God is the standard of judgment.
Which Christian denomination do you think is 100% correct
There are hundreds of thousands of independent Baptist churches, bible churches, non-denominational, Nazarene and others that have no affiliation with any governing board, no matter how easy going they are. They are locally run and the members can fire the pastor if he gets weird on them. Everybody sings the same Christian songs.
Differences are minor, probably less that a half dozen little issues that have nothing to do with Salvation.
The WT likes to make it out that there are thousands of different Christian religions. It is just not true. Here are some of the flavors that believers tend to flock together around.
Millennial vs Amillennial
Calvinism vs. Arminianism
Expository preaching vs. Illustrative
Eternal Security
Relaxed dress vs. business casual
Gifts of the Spirit
The Church is united in salvation under one Leader. Yet, there is much freedom in Christ for believers. I believe the King approves of all the various locally run churches, and probably a great many of the denominational ones as well, because it limits the damage done when one occasionally apostatizes.
It is the same reason that the Lord approves of nation states. When one state goes rogue, the evil is contained.