“are devoted to.” The Hebrew text seems to have been miscopied, but as it is, it basically says, “whose heart walks after the heart of their detestable things.” The meaning of the verse as is generally admitted, refers to the people who hearts are committed to their idols.

“I will bring their way on their own heads.” It is a consistent theme through Scripture that evil people bring evil upon themselves (see commentary on Prov. 1:18). The Hebrew “their way” is literally “their road.” The Bible uses “road” for “way of life.”