Jesus Christ taught against judgementalism because it places us in the position of God - who alone is the judge of everyone.  When we forhet that teaching we move from loving rebuke and encouragement of each other into a dark shadow of assuming power.  

Islam - a religion based around the idea of obedience to a written law - a righteouness attained by outward works rather than inward holiness - can veer off into this darkness.  This is nowhere more terribly illustrated than by the Taleban.  Here is an example of wicked judgmentalism worked out:

http://news.bbc.co.uk/2/hi/south_asia/7997749.stm

Thank God today for Jesus Christ - God's ultimate self-revelation - full of mercy, grace and that most un-Taleban like notion - selfless, unconditional love - iconized in the cross.