41 And when he drew near and saw the city, he wept over it,
42 saying, “Would that you, even you, had known on this day the things that make for peace! But now they are hidden from your eyes.
43 For the days will come upon you, when your enemies will set up a barricade around you and surround you and hem you in on every side
44 and tear you down to the ground, you and your children within you. And they will not leave one stone upon another in you, because you did not know the time of your visitation.”
41-48 Who can behold the holy Jesus, looking forward to the miseries that awaited his murderers, weeping over the city where his precious blood was about to be shed, without seeing that the likeness of God in the believer, consists much in good-will and compassion? Surely those cannot be right who take up any doctrines of truth, so as to be hardened towards their fellow-sinners. But let every one remember, that though Jesus wept over Jerusalem, he executed awful vengeance upon it. Though he delights not in the death of a sinner, yet he will surely bring to pass his awful threatenings on those who neglect his salvation. – Pocket Sword Commentary