Charles Spurgeon Commentary Isaiah 2:6

"For thou hast forsaken thy people the house of Jacob, because they are filled [with customs] from the east, and [are] soothsayers like the Philistines, and they strike hands with the children of foreigners." — Isaiah 2:6 (ASV)

Therefore thou hast forsaken thy people the house of Jacob, because they be replenished from the east, and are soothsayers like the Philistines, and they please themselves in the children of strangers.

The nations then had their soothsayers and fortune-tellers, and the people of God ought not to have so degraded themselves, but they did, and therefore they provoked him, and they sought out foreigners and entered into alliances with them, whereas the Lord had commanded them to be a people separate to himself. It always goes ill with those who profess to be God's people when they forget their separated character and join with the world.

Therefore thou hast forsaken thy people the house of Jacob, because they be replenished from the east, and are soothsayers like the Philistines, and they please themselves in the children of strangers.

It was God's command that they should keep themselves separate, and worship him only; but, in the reign of this man Ahaz, they began to practice all the foul arts of the nations around them. They had soothsayers like the Philistines, – men who pretended to divine future events from the flights of birds, or from the entrails of victims, and a thousand other things; they went into witchcraft, and the unhallowed arts of the pagans.