Yahweh uses a question to express that the people of Israel should be living in Gad rather than those who worship Molech. This question can be translated as a statement. Alternate translation: "There are plenty of Israelites to inherit the land of Israel. The people who worship the false idol, Molech, should not live in Gad." (See: [[rc://en/ta/man/jit/figs-rquestion]])
Here "Molech" represents the people who worship Molech. Alternate translation: "Why do the people who worship Molech" (See: [[rc://en/ta/man/jit/figs-metonymy]])