"Ambassador" is a symbol of the Word of God sent by God to the nations through the messengers of His Will, His Commandments - the Patriarchs, the Prophets, Jesus Christ, the Apostles, all the Righteous.

"Ambassador" is also a symbol of God's Laws, God's established Laws that are sent to the nations to live in righteousness.  

"Ambassador" is a symbol of God's "Messenger," the Righteous One, the Messenger of God's Will, whom God sends to proclaim His Commandments to all nations.

"Embassy" is God's Messenger, the Mission of all the Righteous: their proclamation, proclamation, spreading the Word of Scripture.

Negative Meaning:

"Ambassador" is an image of people motivated by hatred, special opposition to the Will of God, godless, trampling on justice, persecuting the Righteous.  

It is also a symbol of the destructive consequences of peoples' sinful deeds, which are "sent" to them by God as punishment for their rejection, violation of His Commandments.

The "embassy" of evil "Angels" is a natural consequence of the appearance of evil people in the life of the peoples, who are sent to the peoples as a consequence of their choice of the sinful path of rejection, violation of the Will of God.