While insulting the Pharisees and Sadducees, John the Baptist calls an entire generation a "generation
of vipers." 3:7
Jesus often called people names. One of his favorites was to call his adversaries a "generation of vipers."
12:34
The ever-so-kind Jesus calls the Pharisees "hypocrites, wicked, and adulterous." Why? For asking for some
evidence that Jesus is who he claims to be. 16:3-4
When Peter expressed his dismay when Jesus announced his coming death, Jesus said to
him "Get thee behind me, Satan" -- a fine way to address his holiness, the first pope! 16:23
Jesus speaks harshly of his disciples when they fail to cast out the devil, saying "O faithless and
perverse generation, how long shall I be with you?" 17:17
Jesus calls his critics fools, hypocrites, serpents, vipers, killers of the prophets, and just about every
other name he can think of. 23:13-37