You need to read the story again.  Luke 8:26-34 says, “And they arrived at the country of the Gadarenes, which is over against Galilee.   And when he went forth to land, there met him out of the city a certain man, which had devils long time, and ware no clothes, neither abode in any house, but in the tombs.   When he saw Jesus, he cried out, and fell down before him, and with a loud voice said, What have I to do with thee, Jesus, thou Son of God most high? I beseech thee, torment me not.   (For he had commanded the unclean spirit to come out of the man. For oftentimes it had caught him: and he was kept bound with chains and in fetters; and he brake the bands, and was driven of the devil into the wilderness.)   And Jesus asked him, saying, What is thy name? And he said, Legion: because many devils were entered into him.   And they besought him that he would not command them to go out into the deep.   And there was there an herd of many swine feeding on the mountain: and they besought him that he would suffer them to enter into them. And he suffered them.   Then went the devils out of the man, and entered into the swine: and the herd ran violently down a steep place into the lake, and were choked.   When they that fed them saw what was done, they fled, and went and told it in the city and in the country.”

 

The owner of the swine should not have blamed the loss of his animals upon Jesus, but upon the devil and his demons.  It was not Jesus’ idea to send the demons into the swine—that was the request of the demons.  Then, it was not Jesus that caused the swine to run down the hill and drown—that was the demons who caused that.  So the owner should have in no way blamed Jesus for what happened.  It should have been a wakeup call for the owner, and for everyone who reads the story, that the devil and his demons only destroy lives and rob people of their wealth.  That owner should have immediately come to Christ for salvation, like the demon-possessed man did.  Luke 8:35 says, “Then they went out to see what was done; and came to Jesus, and found the man, out of whom the devils were departed, sitting at the feet of Jesus, clothed, and in his right mind: and they were afraid.”

 

The owner of the pigs should have thanked God for being shown the truth about the devil and his demons before he died and went to hell.  Much better to lose all of one’s wealth and see the truth, than to die lost with great wealth, and go to hell.  Luke 16:19-24 says, “There was a certain rich man, which was clothed in purple and fine linen, and fared sumptuously every day:   And there was a certain beggar named Lazarus, which was laid at his gate, full of sores,   And desiring to be fed with the crumbs which fell from the rich man's table: moreover the dogs came and licked his sores.   And it came to pass, that the beggar died, and was carried by the angels into Abraham's bosom: the rich man also died, and was buried;   And in hell he lift up his eyes, being in torments, and seeth Abraham afar off, and Lazarus in his bosom.   And he cried and said, Father Abraham, have mercy on me, and send Lazarus, that he may dip the tip of his finger in water, and cool my tongue; for I am tormented in this flame.”  Mark 8:36-37 says, “For what shall it profit a man, if he shall gain the whole world, and lose his own soul?   Or what shall a man give in exchange for his soul?”