Well the basic idea is that if we are to be punished it should come from someone without sin, which pretty much eliminates most humans unless they insist on being hypocrites. When the apostles asked Jesus to destroy a city of unbelievers he refused. That didn't mean Jesus didn't mind some...
Many Christians skip the majority of the Bible and cherry pick their way through the New Testament. Here is some actual old school biblical badässery you probably missed on, straight from Old Testament:
"Honour thy father and thy mother: that thy days may be long upon the land which the LORD...