Re: Sunni Perspective on Shia Traditions
Her justification, misguided as it was, was that the duty of a ruler was to dispense justice, and one who would not dispense justice was not a ruler.
From her perspective, one of her relatives had been murdered in a regicide and his successor was refusing to investigate the matter, was refusing to seek justice.
Of course, Hazrat Ali (ra) was correctly following the path of lesser evil because he realised that trying to see justice done in this case would lead to civil war, which would be a greater evil than not dispensing justice.
Hazrat Ali (ra) came to power at a critical point when the Ummah was boiling on the verge of Civil War between those who supported Hazrat Usman (ra) and those who opposed Hazrat Usman (ra). Actively siding with one side, though it may have been just, would have tipped the scales and undone all of the nation building done since the life of the Prophet (ra).