As they called them, so they went from them: they sacrificed unto Baalim, and burned incense to graven images.
As they called them - "they", namely, monitors sent by me. "Called," in Hosea 11:1, suggests the idea of the many subsequent calls by the prophets, besides the earlier one by God, through Moses, and originally in the person of Abraham.
Went from them - the Israelites turned away in contempt (Jeremiah 2:27) the monitors sent by me. "They have turned their back unto me, and not their face."
They sacrificed unto Baalim - images of Baal, set up in various places.