When you read your bible you must rightly divide it concerning who is being address Jew, Gentile or church of God. In the case of the verse below it is old testament written to the Jews; expressing God's university view of how He judges the sin. But you would have to kill Adultries, fornators rebellious children and the like if we applied it today. These are all examples of how people were dealt with under the LAW. We are under GRACE and God has made provisions for us to deal with the sin by hating it while loving the sinner whom GOD want to repent of their sin and be saved. Now the world would be better off if we deal with sin like they did in the old testament but most of us would not be here today!
Thank God for the LORD JESUS CHRIST who died to pay our sin debt that we would not have to go to HELL if we would only receive HIm as our Lord and Savior!
Leviticus 20:13 "If a man also lie with mankind, as he lieth with a woman, both of them have committed an abomination: they shall surely be put to death"