When I say something like” you’re like warm” “you’re a sinful human” my Christian friends say “who are you to deside me or my faith”. They are right but I’m simply judging them off the Bible
The Bible doesn't forbid making judgments; it forbids making
hypocritical judgments. Don't attempt to remove the speck of dust in your brother's eye when you've got a log stuck in your own. Don't condemn the sin in another person of which you are yourself guilty.
Jesus himself said, though, "Judge righteous judgment" (
John 7:24). Really, it's impossible to distinguish between right and wrong, good and bad, without judging. Rational thought requires making judgments constantly. And so, in the New Testament, you can read of Jesus judging the Pharisees (
Matthew 23), Paul judging the Judaizers (
Galatians 5:1-12), Peter judging false teachers (
2 Peter 2), James judging the faith-without-works crowd (
James 2), and Jude judging those who were "turning the grace of God into lasciviousness" (
Jude 1)
As you've indicated, the proper standard by which to judge a person's thinking and behavior is the Bible, not your own personal preferences and perspectives. But when you shine the light of the truth of God's word on the sin in a person's life, your motive is supposed to be that of love, not self-righteousness (
Ephesians 4:15). Do you desire to see a person freed from sin's destructive power and brought into deeper, more joyful fellowship with God when you say to that person "You're in sin"? If not, keep silent 'til you do.