Actually no... your premise is off...
Remember when Jesus Christ was writing in the sand, as the woman was about to be stoned...
the Elders left first...
which proves, they were still able to hear, with hearts tendered enough... to leave, and drop their stones, along with their former ideal of stoning the Adulterous woman...
God's love is so warming, that the most stubborn heart can be melted... if you were standing within the rays of Jesus Christs love... it would be a wonderment for you, or any who profess that there hearts were stone.
The Pharisees hearts were so cemented into to their self imposed idols... these men, if the Jews were not so afraid of them, would have been stoned by their own. They ruled with an iron fist... with the velvet glove of smoothness... they had no mercy whatsoever.
Jesus Christ's love is able to touch anyone who had (has) even a mustard seed of faith, that, He was ( is) that, just maybe, He was, who he is, and claimed to be...
It is wonderful to know, that within a hardened heart, there still remains one soft spot for that seed to be planted... God can tend the rest. I hope there is that one little piece of fertile soil in all hearts so God can enter!
May His blessings be with us all.
Love
Kar