If belief in the longevity of someone is a sign of ignorance...

If belief in the longevity of someone is a sign of ignorance, then why are none of the aforementioned scholars attributed with ignorance, whilst they have narrated many traditions in their books and Ṣaḥīḥs about the longevity of al-Dajjāl? How can someone be regarded as ignorant because he believes in the Mahdī’s longevity whilst the Holy Prophet, Allah’s blessings be on him and his family, has considered this permissible for al-Dajjāl, the enemy of Allah?!

To sum it up, once it is shown there have lived people who have had long lives, there remains no reason for being amazed and surprised, let alone considering it improbable or believing it to be impossible for others to have long lives too. Sayyid b. Ṭāwūs, may Allah have mercy on him,…