2 Chronicles 24:21 Commentary - English Annotations on the Holy Bible by Matthew Poole
They conspired, i. e. the people to whom he preached, who were easily corrupted by the examples of their apostate king and princes.
Consult other comments:
2 Chronicles 24:21 - Albert Barnes' Notes on the Bible
2 Chronicles 24:21 - Joseph Benson’s Commentary on the Old and New Testaments
2 Chronicles 24:21 - Adam Clarke's Commentary and Critical Notes on the Bible
2 Chronicles 24:21 - Companion Bible Notes, Appendices and Graphics
2 Chronicles 24:21 - Ellicott's Commentary for English Readers (Old and New Testaments)
2 Chronicles 24:21 - Geneva Bible Notes
2 Chronicles 24:21 - John Gill's Exposition of the Entire Bible
2 Chronicles 24:21 - Hawker's Poor Man's Commentary (Old and New Testaments)
2 Chronicles 24:21 - Keil & Delitzsch Commentary on the Old Testament
2 Chronicles 24:21 - English Annotations on the Holy Bible by Matthew Poole
2 Chronicles 24:21 - John Trapp's Complete Commentary (Old and New Testaments)
English Annotations on the Holy Bible by Matthew Poole

Matthew Poole (1624–1679) wrote English Annotations on the Holy Bible, completing the chapters as far as Isaiah 58 before his death in 1679. The rest of the Annotations were completed by friends and colleagues among his Nonconformist brethren. The first printing of the completed edition was in 1685, 2 volumes folio, followed by editions in 1688, 1696 (with valuable chapter outlines added by the editors, Samuel Clark and Edward Veale), and the 4th and definitive edition in 1700, the basis of all others.