This situation is definitely sad and confusing.
Following another suicide threat, Facebook shut shown Sinéad O'Connor's account at the request of her loved ones. The threat comes on the heels of a public and desperate plea for her children to visit her in the hospital.
While we're not exactly which family members requested the deactivation, we suspect her two older children Jake and Roisin made the plea. The move seems sensible in light of the now deleted threat (below):