Why did God give Israel the ritual worship system and ceremonial law?
God gave Israel the ritual worship system and ceremonial law to compensate for their breaking of the moral law. This ecclesiastical part of the legal system, including the tabernacle and priesthood, ensured Israel knew exactly what to do under any set of circumstances.
Les explains that because Israel broke the moral law, God gave them the ritual or ceremonial system of worship—the ecclesiastical part of the legal system—to compensate. This involved the tabernacle and the priesthood, so that Israel would know exactly what to do under any set of circumstances. Les also notes that the tabernacle is beautiful in type.