One indication of Israel"s opposition to her King was the antagonism she displayed toward John and Jesus" methods ( Matthew 11:2-19). Another was her indifference to Jesus" message. Jesus and His disciples had preached and healed throughout Galilee. However most of the people did not repent. Therefore Jesus pronounced judgment on their cities that had witnessed many mighty miracles. Jesus had the residents of the cities in view when He spoke of the cities. [source][source][source]
"Those who really wish to know their Bibles should see that we are in new country from this verse forward. Draw a thick black line between the nineteenth and the twentieth verses. There is a great divide here. Truth flows down to opposite oceans from this point. We are face to face with a new aspect of the work of Christ. The Lord Jesus was henceforth a different Man in His action and in His speech. The One Who was the meek and lowly Jesus was about to exhibit His strong wrath in no uncertain way." [1][source]