What does "throwing yourselves into destruction" mean?

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

1. It means withholding spending in the way of Allah. [Ḥudhayfah, Ibn ʿAbbās, al-Ḥasan, Ibn Jubayr, ʿIkrimah, Mujāhid, Qatādah, al-Ḍaḥḥāk]
2. It means refraining from fighting due to preoccupation with wealth. [Abū Ayyūb al-Anṣārī]
3. It means despairing of Allah's mercy. [Al-Barāʾ, al-Nuʿmān b. al-Bashīr, ʿUbaydah]
4. It means the punishment of Allah. [Narrated by Ibn Abī Ṭalḥah from Ibn ʿAbbās]