Romans 14:10
But why do you judge your brother? or why do you (regard with contempt /despise /disesteem /disdain) your brother? for we shall all stand before the judgment seat of CHRIST.

1John 3:14,15
14. We know that we have passed from death unto life, because we love the brethren. He that loves not his brother abides in death.
 15. Whosoever hates his brother is a murderer: and you know that no murderer has eternal life abiding in him.