God was not happy with His people, the Jacob family. They copied bad ways from far lands, used magic lies, and made deals with people who do not know God.
For You have abandoned Your people, the house of Jacob, because they are filled with influences from the east; they are soothsayers like the Philistines; they strike hands with the children of foreigners.
KJV
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.
ASV
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.