It seems likely that Syria and Samaria attacked Ahaz because he would not join in a federation against the growing power of Assyria. A strong party seems to have pressed this policy on him, but in all such schemes they repudiated the Divine Protection, Isaiah 8:6. Compare Psalms 46:4. Ahaz and the court party on the other hand, sought to federate with Assyria. But Isaiah never ceased to urge that the true line of defense was to put away whatever was inconsistent with the fear of God. He would be the sanctuary of defense and hiding in the day of trouble, Isaiah 8:13-14. We learn from Hebrews 2:13, how absolutely, when speaking thus, the prophet was being prompted by the Holy Spirit. If men will not build on God's foundation-stone, they fall over it to their hurt. Compare Isaiah 8:15 and Matthew 21:44. Are we not all in danger of substituting human alliances for federation and union with the eternal God? Let our fellowship be with the Father and the Son; and let us wait for Him till the day dawn and the day star shines, 2 Peter 1:19. [source]
Chapter Summary: Isaiah 8
1In Maher-Shalal-Hash-Baz, he prophesies Syria and Israel shall be subdued by Assyria 5Judah likewise for their infidelity 9God's judgments shall be irresistible 11Comfort shall be to those who fear God 19Great afflictions to idolaters