Salaamu 'alaikkum, I do not know how someone can stop picking faults when they (the shia''s) curse the flagbearers of islaam, namely abu bakr, 'umar, 'uthmaan. These companions were loved by the Prophet Muhammed salallahu 'alaihi wa salaam, and scholars of the past have said that it is the creed of Ahlus sunnah wal jamah that the none of us reviles them and some of them said that the one who curses the sahabah has committed kufr.
Ibn 'Ab-bâs (radhiAllahu anhu) said: “Do not revile the Companions of Allâh's Messenger
saw2
, for one hour spent with Allâh's Mesenger
saw2
by one of them is better than a good deed of one of you (done) for forty years.”
The Prophet
saw2
said:
“Do not revile my Companions! Do not revile my Companions! For by the One whose Hand my soul is in, if one of you were to give away the size of mount Uhud in gold for charity, it would not equal a mudd of one of them nor even half of it.”
Khatîb Al-Baghdâdî reports a narration with the chain connected to Abu Zur'ah, in his book Al-Kifâyah:
“If you see a man seeking to belittle anyone amongst the Companions of Allâh's Messenger
saw2
, then know that he is a heretic (zindîq). This is because according to us the Messenger of Allâh
saw2
is true and the Qur'ân is true, and the only ones who brought this Qur'ân and the Sunan (plural of Sunnah) to us are the Companions of Allâh's Messenger
saw2
. They only wish to disparage and demolish our witnesses so that they can nullify the Book and the Sunnah, whereas they are more deserving of being disparaged for they are the heretics (zanâdiqah).”
Shaykh Abdul Muhsin Al 'Abbaad hafidhullah, in his book on "Creed of Ahlus Sunnah wal-Jama'ah concerning the Sahabah", quotes Imaam at Tahawi's statment (from the book: Creed of Ahl-us-Sunnah):
"We love the Companions of Allâh's Messenger
saw2
. We do not go to extremes in the love for anyone amongst them, nor do we absolve ourselves from any of them. We hate anyone that hates them or anyone that speaks ill of them. We do not mention them except with good. Loving them is Dîn, Îmân and Ihsân and hating them is Kufr, Nifâq (hypocrisy) and Tughyân (transgression).”