Matthew Poole and continuators on 2 Kings 18:7

7 And the LORD was with him, and he prospered whithersoever he went forth: and he rebelled against the king of Assyria , and served him not.

He shook off that Yoke of Subjection and Tribute, to which his Father had wickedly submitted, Chap. 16. 7. and reassumed that full and independent Soveraignty which God had setled in the House of David, which Ahaz could not alienate further, than for his own time. And Hezekiah's Case differs much from that of Zedekiah, who is blamed for Rebellion against the King of Babylon, both because he had ingaged himself to him by a Solemn Oath and Covenant, which we do not read of Ahaz; and because he broke the Covenant which he himself had made, &c. because God had actually given the Dominion of his own Land and People to the King of Babylon, and Commanded both Zedekiah and his People to submit to him. And whereas Hezekiah is here said to Rebel; that Word implies, onely a defection from that Subjection which had been professed and performed to another; which sometimes may be justly done, and sometimes may not: and therefore that Word doth not necessarily prove this action to be a Sin. And these Words, he rebelled, &c. are explained by the next following Words, and he served him not. And that it was not a Sin in him, seems most probable, because God did own, and assist him therein; and did not at all reprove him for it, in that Message which he sent to him by Isaiah about this matter, Chap. 19. 20, &c. nor afterwards, though he did particularly reprove him for that which might seem a less fault, for his Vain-glory, and Ostentation, 2 Chron. 32. 25, 26. For what he saith, I have offended; see on, ver. 14.