All of you meaning iblees as well?
The phrase "all of you" in Q. 2:36, "Go down, [all of you], as enemies to one another," refers to Adam, Hawwa' (Eve), and Iblis (Satan).
Ibn Kathir clarifies that Iblis was included in the command to the angels to prostrate before Adam, even though he was not an angel but a Jinn who "was trying - and pretending - to imitate the angels' behavior and deeds" (Source 9). His disobedience stemmed from arrogance (Source 8).
Linguistically, the Arabic verb اهْبِطُوا (ihbitū) is a plural imperative, indicating a command directed at more than two entities. The subsequent phrase بَعْضُكُمْ لِبَعْضٍ عَدُوٌّ (baʿḍukum li-baʿḍin ʿaduwwun - "some of you to some others are enemies") reinforces that multiple parties are involved in this enmity. This includes Adam and Hawwa' as one party, and Iblis as the adversarial party.
The context of Iblis's expulsion for refusing to prostrate (Q. 2:34) and his subsequent role in causing Adam and Hawwa' to slip (Q. 2:36) confirms his inclusion in the command to descend, establishing the enmity between humanity and Shaytan.
📚 Sources: Classical tafsir (multi-source)