Blessed is the man who opens his lips in praise of God of Sabaoth and praises the Lord with his heart.
Cursed every man who opens his lips for the bringing into contempt and calumny of his neighbour, because he brings God into contempt.
Blessed is he who opens his lips blessing and praising God.
Cursed is he before the Lord all the days of his life, who opens his lips to curse and abuse.
Blessed is he who blesses all the Lord’s works.
Cursed is he who brings the Lord’s creation into contempt.
Blessed is he who looks down and raises the fallen.
Cursed is he who looks to and is eager for the destruction of what is not his.

Some people, even some Christians, think we should curse, insult, and even deny civil rights to others because of their beliefs, faith, nationality, sexual orientation, skin color, etc.  As this passage indicates, those who curse others are cursing themselves.