"Blessed is the one who does not walk in step with the wicked or stand in the way that sinners take or sit in the company of mockers." (Ps.1:1)
The Bible warns us away from "the wicked, sinners and mockers", because God knows how easily we can be drawn into Satan's miry clay. However, Jesus wants us to disciple all humans irrespective of who or what they are, which means we cannot lock ourselves up physically in a monastery or convent. Spiritually, yes, but we need to rub shoulders with those world citizens as REDEEMED sinners, to Bless those mockers with THE WAY!