1. satan himself. ibliis aka lucifer. he was immensely saddened on the occasion of the blessed birth.
2. those who follow satan.
The rest of the creations of Allah rejoice on the occasion of the noble birth of RasulAllah ﷺ.
DO NOT follow those dogs of hellfire who start screaming like their father ibliis, on the occasion of the noble birth of RasulAllah ﷺ and the Muslims’ celebrations, rejoicing, and thanking Allah for the greatest of His creations and the greatest manifestation of His Mercy. May Allah always damn their faces.