Why is he king in Yeshurun?

Because all the blessings received by the tribes are based on their status as "the country of priests and the country of holiness" of God (for example. 19: 6), and according to the fact that God is king in Jeshurun, their own actions and actions are not worthy. According to relevant information, Jeshurun is regarded as God's intimate address to Israel in the Bible. About BC 1450, Moses, the leader of Israel, led the Israelites out of Egypt to Canaan, a land flowing with milk and honey promised by God. Before he died, according to God's instructions, he wrote a poem that predicted that Israel would abandon God in the future, so as to urge the descendants of these rebellious people to remain vigilant in future disasters and reflect on all the evils that brought them bad results.