A condescending attitude is often mistaken as piety. Removing that illusion however, will reveal hypocrisy at its finest, the main reason Jesus reproached the Pharisees for being like whitewashed tombs that are beautiful in the outside but filled with dried bones and rotting flesh inside.
Now that paints an ugly picture especially when viewed from the outside. Because in as far as witnessing is concerned, nothing comes off as a surefire “turn off” than a hypocrite pretending to be a saint.
If we as Christians are to convert the gentiles and bring the wayward sheep of Israel back into the fold, we should instead come from a place of love.
Recall the story of Mary Magdalene and Zacchaeus. Jesus did not cite the 10 commandments to condemn them right then and there of their sins, nor did He summon heaven’s fury to devour their wretched sinful souls. He instead showed love and mercy through forgiveness, as His standpoint which eventually led to their conversion.
Out of love came forth mercy and actions within the context of love.
But a condescending attitude is begotten from a sanctimonious “holier than thou” mindset. And that, is the exact opposite of our mission as children of God which we claim to be, which is to spread His message of love to a lost world.