What is the meaning of Matthew 21:40-41?

40 When the lord therefore of the vineyard cometh, what will he do unto those husbandmen? 41 They say unto him, He will miserably destroy those wicked men, and will let out his vineyard unto other husbandmen, which shall render him the fruits in their seasons. (Matthew 21:40-41 KJV)

William Burkitt’s Commentary

Observe here, At the first mentioning of the parable, the Pharisees express a bitter indignation against such wicked servants, not considering what a dreadful sentence they passed upon themselves and their own nation. Little did they think, that thereby they condemned their temple to be burnt, their city to be destroyed, their country to be ruined; but in these words they vindicate God, they condemn themselves, and own the justice of God, in inflicting the severest punishments on them.