The religious hypocrisy of His day?
Despite time, this sin of unbelief remains in many parts of traditional Christianity today, where Jesus is no longer Jewish?
Faith is the answer to believing, since there is no other way to be saved, but many abandoned this concept for something that is more easier and less accountable and that is why there is so much scandal in those denominations, when there is not repentance!
The more our Lord spoke the more they set their hearts to kill Him, since He was showing them what they were and that more so of dishonesty and making excuses in how to get around the law, something that many Christians today also excuse to their fate?
God is merciful, compassionate and kind to all who seek Him and to us He is our comforter through the Holy Spirit that is within us!
Acts 8:37, Proverbs 30:5, Hebrews 9:26-27.