We can Judge those who claim to be our Brothers in Christ! We are to Judge them for the lies they teach, and we are to expose them for the Evil they do in the name of God!
Matthew 7:1-2 says we are not to Judge others for the sins they do. BUT we ARE to Judge then if they are teaching lies in the name of God!
Friend, you better 'slow down' and 'know' the Holy Scripture of the HOLY BIBLE is 'judging' all of us. This 'based on', as we will know them 'by their fruit', and 'addressing' to them to 'repent' to our GOD in the name of LORD JESUS CHRIST, the 'author and finisher of our faith', according to the written 'Covenant' made with us by GOD, which is the New Covenant/Testament. Which 'call' all of us to 'practice' and 'abide' and 'bear much fruit' and 'our fruit must abide'.
If anyone is 'born again from above' and of the 'New Covenant/Testament', are able to 'perceive' all of these have been 'testified', which are 'spirit' and 'life' from the 'mouth' of LORD JESUS CHRIST.
As it is written;
"My sheep 'hear My voice' and they 'follow Me' ...................................................................."
GOD bless you all in the name of LORD JESUS CHRIST.