In The Name of Allaah, The Most Merciful, The Bestower of Mercy.
Al-Allaamah Rabee Bin Haadee [hafidhahullaah] said: “Uthmaan [radiyallaahu anhu] was one those who restrained the people from bloodshed the most and [restrained himself regarding the affair] of those who violated his honour. Shakhul Islaam Ibn Taymiyyah [rahimahullaah] said, ‘And what is well known through successive numerous narrations is that indeed Uthmaan [radiyallaahu anhu] was one of those who restrained the people from bloodshed the most, exercised patience the most regarding the affair of those who violated his honour and those who made a determined attempt to shed his blood; so they besieged him and endeavoured to kill him, and he knew their desire to kill him. Indeed, the Muslims came to him from every place to help him and indicated to him to fight the beseigers, but he commanded them to refrain from fighting and commanded those who obeyed him not to fight. It has been reported that he said to his slaves, ‘Whoever restrains his hand is freed’. It was said to him, ‘Will you go to Makkah?’ He said, ‘I will not be amongst those who commit evil in the sacred precinct’. Then it was said to him, ‘Will you not go to Syria?’ He said, ‘I will not leave my place of Hijrah [i.e. Madeenah]’. Then it was said to him, ‘Fight them’, so he said, ‘I will not be the first in the Ummah of Muhammad [sallal laahu alayhi wasallam] to unleash the sword after the departure of Muhammad’. Uthmaan’s [radiyallaahu-anhu] patience until he was murdered is one of his greatest virtues in the sight of the Muslims’”. [An Excerpt from Al-Mukhtaaraat Al-Bahiyyah Min Kutub Shaikhil Islaam Ibn Taymiyyah. Page 296. Slightly paraphrased]
The Rulers Are Not to Be Fought Even If They Are Tyrants, Then How About Fighting a Just Ruler Like Ameerul Mumineen Uthmaan Bin Affaan
Closing The Door Of Rebellion Against The Ruler- By Shaikh Abu Iyaadh [hafidhahullaah]