Here is a reply to your question Brother, reply by Shaykh Sayyid Muzaffar Hussain Shah al-Qadri: http://www.deenfort.com/refutations/fitna/deception-of-marwan-ibn-al-hakam/
X said: How odd. A scholar has just launched an appalling attack on Marwan ibn al-Hakam, the Umayyad khalifa, abusing him terribly. Does he not realise that Marwan is one of the narrators of the sahih hadith according to al-Bukhari and others, who would never have narrated from a deviant or a wicked person? Y said in response: Pure intellectual dishonesty La Hawla wa La Quwwata Illa Billah Inshallah I will be giving a detail online lecture on the cursed Marwan, his crimes against the Ahlul-Bayt and Islam, his killing of prominent Sahabah and ultimately his cursing of Imam Ali alayhisalaam What is the Sunni position?
