Once again, the first matter to consider is that no one has a right to judge other people. Instead, we are commanded to love other people.
If someone is a Christian, they believe Hell exists. And they believe that they deserve Hell due to their sin, and that only because Jesus suffered and died in our place to pay for our sins do we escape Hell.
And Christians also believe that Hell is something like what it would be like to be trapped on the upper floors of the burning World Trade Center on 9/11, except there’s no escape - endless torment.
If you believe that you’ve been spared from such a fate which you deserved, by God just showing mercy to you, then you will walking humbly before Him, which means being humble and loving towards other - which He commands us to be if we will receive His mercy and be spared Hell.
The Bible is God’s contract with us, in particular the New Testament, or Covenant. And these words “judge” and “love” have to be defined as He tells us to define them.
And we are take seriously every word of God’s Covenant with us. This is Matthew 12:36:
“But I say unto you, That every idle word that men shall speak, they shall give account thereof in the day of judgment.”
The Bible says a lot about how we are to treat others, including when we speak of them, and think of ourselves, and fear God. Jesus preached that. The Bible instructs us on the attitudes we’re supposed to have, and not have, and God’s commands aren’t optional. If we’re going to say negative things about others, then we have to be humble, we have to have love for the other person, take the mote out of our eyes, and remember our own sin against God, and how terrible it is, and our need for His forgiveness.
” no one has a right to judge other people.”
And yet Jesus condemned the Pharisees. We are also commanded to judge our church leaders (1 Tim 3). We are also commanded to judge false prophets. Paul told the church to condemn the man living with his mother-in-law.
The state demands we judge people in court when we serve on a jury.