Whom does "their devils" (shayāṭīnihim) refer to?

Imām Ibn al-Jawzī (d. 597 AH / 1201 CE) summarized the scholars' opinions in his book "Zād al-Masīr" as follows:

1. Their leaders in disbelief. [Ibn Masʿūd, Ibn ʿAbbās, al-Ḥasan, al-Suddī]
2. Their fellow polytheists. [Abū al-ʿĀliyah, Mujāhid]
3. Their religious leaders. [Al-Ḍaḥḥāk and al-Kalbī]