2 Kings 21:24 - Joseph Benson’s Commentary on the Old and New Testaments

The people slew all that had conspired against King Amon Thus they cleared themselves from having any hand in the crime, and did what was incumbent on them, to deter others from the like villanous practices. And the people made Josiah his son king It is probable the conspirators had designed to put him by, but the people stood by him, and settled him on the throne, encouraged, it may be, by the indications he gave, even in his early days, of a good disposition. Now they made a happy change from one of the worst to one of the best of all the kings of Judah. Once more, said God, they shall be tried with a reformation: if that succeed, well; if not, then, after that I will cut them down.