Jesus taught that only one with greater righteousness than the scribes and Pharisees could enter the kingdom of heaven. Who then can be saved? Only through the true Messiah, the Lord Jesus Christ, by repentance and faith.
Josiah did more to reform God's people and bring them back into a right relationship with the LORD than the kings before and after him.
In the life of Jesus, the Passover figures more prominently than any other feast, from His childhood to His final hours before the crucifixion. This is why.