Is it obligatory to fight under every leader, whether righteous or wicked?

Primary text

Jihad is obligatory upon the Muslim community under every appointed leader, whether he is righteous (Birr) or wicked (Fajir). Refusing to fight under a wicked leader leads to the cessation of Jihad, the dominance of disbelievers, the eradication of Muslims, and the ascendancy of disbelief, which results in immense corruption (Quran 2:251). This obligation is established by the report from Abu Hurayrah: 'Jihad is obligatory upon you with every Amir, whether he is righteous or wicked' (Hadith narrated by Abu Dawud). Moreover, steadfastness in Jihad is an element of faith, alongside withholding condemnation from one who utters the Shahada and believing in divine decree (Hadith narrated by Anas via Abu Dawud).