You may need to make explicit why he put his son in the fire and what happened after he did so. Alternate translation: "he burned his sons to death as an offering to his gods" (See: [[rc://en/ta/man/translate/figs-explicit]])
Here Yahweh's "sight" refers to how he judges or decides on the value of something. See how you translated a similar phrase in [2 Chronicles 14:2](../14/01.md). Alternate translation: "Manasseh did many things that Yahweh said were evil" or "He practiced the things that Yahweh considered evil" (See: [[rc://en/ta/man/translate/figs-metaphor]])