Shaikh Yahya (May Allah preserve him) writes why the most hated and ugliest of the traditions of the time of Ignorance is this partisanship with proofs from the Quran and the Sunnah.
Source: https://torontodawah.com
Author: Shaykh Abu Abdir Rahmaan Yahyaa bin Alee Al-Hajooree
Translator: Faisal Ibn Abdul Qaadir Ibn Hassan Abu Sulaymaan (May Allah preserve them both)
SalafiMakthaba Quran and Sunnah according to the understanding of the righteous predecessors.