Why should there be wrath of the God of heaven against us?

Ezra 7:1-28
Ezra was a teacher well versed in the Law of Moses. The king (Artaxerxes) had granted him everything he asked for the hand of the Lord his God was on him.
Ezra had devoted himself to the study and observance of the Law of the Lord, and to teaching its decrees and laws in Israel.
The letter King Artaxerxes is written:
Why should there be wrath of the God of heaven against the realm of the king an of hos sons?
All of the servants at the temple of the Lord have no authority to impose taxes, tribute or duty.
Whoever does not obey the law of your God and the aw of the king must surely be punished by death, banishment, confiscation of property, or imprisonment.
Praise be to the Lord, who has put it into the king's heart to bring honor to the house of the Lord in Jerusalem in this way and who has extended his good favor to me before the king and his advisers and all the king's powerful officials. Because the hand of the Lord my God was on me.
The story of Ester, the queen who saved the Jewish people from massacre fits into the interval of nearly 60 years which separates 7:1 from 6:22
Why?
Ezra is a scholar of God's law. He will teach it to the new community of God's people, so that they will not repeat past mistakes.
1)Devoted himself, 2)study and 3)observance the Law of God and 4)teaching it. Four steps in Ezra effort in Israel.
Most important factor is the hand of the Lord is on Ezra.
Fear the Lord is the basic good altitude of the king in nations.
How?
Prepare ourselves and waiting for the mission of the Lord comes to me. Fear the Lord is beginning of the blessing and wisdom.