Why did Imam Ibn Hazm reject the narrations of Abu al-Tufayl al-Kinani, even though all the Companions are considered upright and trustworthy?

Abu al-Tufayl al-Kinani al-Makki, 'Amir ibn Wathilah, was a Companion who saw the Prophet, may Allah bless him and grant him peace. Most scholars agreed upon his companionship and that he was the last of the Companions to die. His narrations are accepted, making him an authority among the people of Sunnah. Some scholars disliked narrating from him because he was a Shiite, but his Shiism did not exceed preferring 'Ali over others, while acknowledging the virtue of the two Sheikhs, Abu Bakr and 'Umar.

As for Ibn Hazm's non-acceptance of his narrations, there are two reasons: first, that he was a standard-bearer for Al-Mukhtar al-Thaqafi, and second, his belief in Al-Raj'ah (the return). However, scholars refuted Ibn Hazm, stating that he himself used Abu al-Tufayl's narrations as evidence in two places in Al-Muhalla. They also argued that Abu al-Tufayl's joining Al-Mukhtar in the beginning was to avenge the killers of Al-Husayn, and this does not imply his knowledge of Al-Mukhtar's true intentions. Furthermore, there is no definitive proof for the accusation that he believed in Al-Raj'ah.