How could angels oppose G-d’s creation of man?

The Midrash teaches that an exchange took place between G-d and a group of angels before the creation of Adam, the first man.

Seraph AngelThis is related and explained on p. 42 of the book “True Existence”, which is an English translation and explanation of a Hassidic discourse by the fourth Lubavitcher Rebbe, Rabbi Shmuel (available from Kehot; see Quoting from the book:

“When G-d sought to create man, He created a group of ministering angels and asked them: ‘Is it your will that we create man in our image?’ They replied: ‘Master of the Universe, what are his deeds?’ G-d said: ‘Such and such will be his deeds [i.e., both good and evil].’ They said [Psalms 8:5]: ‘Master of the Universe! What is man that You should remember him, the son of man that You should be mindful of him?’ G-d then extended His little finger among them and consumed them (Tractate Sanhedrin 38b).

The extending of G-d’s ‘little finger’ refers to a revelation of the tenth and lowest of the ten sefirot [Divine emanations], which is Malchut [Kingship], the source for creation. When this source is revealed to the created entity, the entity loses its being. By consuming the angels through revelation, G-d answered their question regarding the value of the creation of mankind: that mankind, through the fulfillment of G-d’s will on the physical plane, would transcend the limitations inherent to creation and would be able to receive revelation without losing existence.”

In other words, angels are created and exist in the spiritual levels within which G-d makes a purposeful concealment (at least somewhat) of His revelation, and the angels themselves are part of that process by which G-d conceals Himself. Therefore, they are not capable of understanding why G-d would create a physically limited being to whom He is planning to reveal Himself. Thus a conflict arises in the angels’ psyche when they learn that G-d is about to make a major revelation in the physical world, that will significantly advance the process of His eventual open revelation to mankind – namely, at critical times in history when this took place, or will take place: the creation of Adam, the exodus from Egypt and the splitting of the Red Sea, the giving of the tablets of the Ten Commandments from Heaven to Moses at Mount Sinai (when Moses had to argue against the angels that the Torah’s Commandments were intended for human beings on earth, not the angels in Heaven), and the future coming of the Messiah/Moshiach. Therefore, based on the limitations of their created intellect, the angels are bound to question G-d about His intention to bring about these events, as to whether that is really something that He wants to do, and how it could be justified in the frame of reference of the holy spiritual angels.

The ultimate justification is that G-d desires a dwelling place (a place where He can be openly revealed) in the lowest created realm. Therefore the future eternal dwelling place for His revelation will be specifically with human beings in this physical world. The observance of the Noahide and Jewish commandments in His Torah (which literally means “instruction”) provides the means for preparing ourselves and the world for this ultimate state of melded physical and spiritual existence.