"their religion is mere hypocrisy "

Jesus Debates the Pharisees
Public DomainJesus Debates the Pharisees
Throughout the Gospels, Jesus deals more harshly with religious hypocrites than with other types of sinners, including prostitutes and thieves. He called such religious leaders 'snakes' and 'a brood of vipers', accused them of being full of 'greed and self-indulgence', and warned them that they were like whitewashed tombs: 'beautiful on the outside but on the inside are full of dead men's bones and everything unclean' (Matthew 23).