Matthew 8:34

‘And behold, all the city came out to meet Jesus, and when they saw him, they pleaded with him that he would depart from their borders.'

And the consequence was that ‘all the city' (both Jews and Gentiles) consulted together through their elders and then came to Jesus in a large deputation on behalf of the whole city, and begged Him to leave their borders. They knew what a Jewish prophet would think about pigs, and they did not want any further attacks on their herds. It may also be that they were afraid to have such a powerful Jewish prophet among them. Who could know what might happen next? Every Jew would read out of this that they preferred their uncleanness to the purity of God.