1)
Did Achaz continue to serve Elohei Malchei Aram even after he saw that they did not help him?
1.
Malbim: After he served them, Melech Ashur exiled Aram. Achaz thought that Elohei Malchei Aram helped Melech Ashur because he served them!
2)
Why does it say "Lehachshilo ul'Chol Yisrael"?
1.
Malbim: After he began to abolish the copper Mizbe'ach, later he abolished all the Kelim.
