Is this how tha "rightly guided caliph " behaves?

Uthman was also cruel to Jandab Bin Junada, known as Abu Dharr Ghifari, one of the intimate companions of the Holy Prophet and a learned man. Great traditionists and historians of both sects have reported that this ninety-year-old man was unjustly exiled from place to place with utmost ignominy - from Medina to Syria, to Medina again, and then from Medina to the desert of Rabza. He rode on a naked camel accompanied by his only daughter. He died in Rabza in penury and neglect. Your prominent ulema and historians, including, Ibn Sa'd, in his Tabaqat, Volume IV, page 168; Bukhari in Sahih, Kitab-e-Zakat; Ibn Abi'l-Hadid in his Sharhe Nahju'l-Balagha, Volume I, page 240 and Volume II, pages 375-87, Yaqubi in his History, Volume II, page 148; Abu'l-Hasan Ali Bin Husain Mas'udi, the famous traditionist and historian of the fourth century in his Muruju'dh-Dhahab, Volume I, page 438, and many others have recorded Uthman's cruelty. It has been widely reported how he mistreated the pure-hearted Abu Dharr, the loved one of the Holy Prophet, and also how Abdullah Bin Mas'ud, the hafiz and recorder of Wahi, who was given forty lashes because he bid farewell to Abu Dharr Ghifari. Insulting treatment was likewise shown to Ali for the same reason