The only One who can truly judge another person is the One who knows the heart.  We don’t know and we can’t know, so leave it to Him!  We may judge people as being bad or evil just because they do not agree with our views on the matter.  That is how biased we are.  If we do not like someone, we are not likely to judge them fairly.  God loves everyone.  He can judge all.  Because of His love, His judgment is always tempered with mercy and grace.  That also might work for us.  Remember, the way we hand out judgement is the way we will be judged.

“Do not judge, or you too will be judged. For in the same way you judge others, you will be judged, and with the measure you use, it will be measured to you.” Matthew 7:1-2 (NIV)