Abi Sufyan...
Abi Sufyan, for he reviled and cursed the best of all companions and certainly meant to curse the Apostle of Allah who said: 'He who has cursed 'Ali has cursed me, and he who has cursed me has cursed Allah;'" at that, they stammer and hesitate in answering. They say things, which if they point to anything, merely indicate the stupidity of their minds and deep, blind fanaticism.
Some of them, for example, respond by saying: "These are the lies fabricated by the Shi'as" and others say: "They are the companions of the Prophet of Allah; they can say what they wish to about others. As for us, we are not at their level to criticize them.” Glory and all Praise be to You, my Lord! Your words in the noble Qur'an led me to the realities which were difficult for me to comprehend and believe.
Every time I used to read: "And We have prepared for hell many of the jinn and humankind, they have hearts through which they understand not; they have eyes with which they see not and ears with which they hear not. They are like cattle, nay, worse yet; they are those who are heedless" (7:179). I used to be astonished [at this] and would ask myself: "How can this be?" Can a dumb animal be better guided than this human?
Is it possible for a person to admire a stone, then worship and seek sustenance and assistance from it? However, praise be to Allah, my astonishment ceased when I dealt with people and travelled to India where I saw astonishing upon astonishing things, doctors in anatomy, well versed in knowledge of the cell structure of human and its formation, yet they worshipped the cow. Had this sin been committed by the ignorant Hindus, one would have accepted their excuse.
But you will see the cream of their intellectuals worshipping cows, stones, the sea, the sun and the moon. After [seeing] this, there remains [no alternative] but for you to submit and to understand the things to which the glorious Qur'an points to, especially those human beings who are more misguided than animals.
Abu Dharr al-Ghifari's testimony regarding some of the companions Al-Bukhari reports in volume 2 under the heading "That from which Zakat is paid is not Buried Treasure" from al-Ahnaf b.