few ppl refers hurra as a tragedy and event of mass killings … that is pure exaggeration. few tribes of medina revolted against the govt, they were given warning many times and even when the army invaded madina it stayed 3 days outside madina and asked the ppl not to oppose the govt. but when the revolter did not listen they had to face the consequences.
however there was not that kind of bloodshed as it is generally reported. akabir sahaba did not approve the revolt and narration of hazrat abdullah ibn umer in this regards has been quoted by imam bukhari as well as imam muslim. it is said that even hazrat ali bin husaain did not support the revolt of ppl of medina.
interestingly nobody dare to discuss the wazaaif hazrat yazid granted to ppl of medina including aal e hussain.