ph ▁ ▁At ▁the ▁beginning ▁Ali ▁told ▁people ▁that ▁Muslim ▁polity ▁had ▁come ▁to ▁be ▁pl ag ued ▁by ▁diss ension ▁and ▁disc ord ▁and ▁he ▁wanted ▁to ▁pur ge ▁Islam ▁of ▁all ▁evil ▁from ▁which ▁it ▁had ▁come ▁to ▁suffer . ▁Then ▁war ned ▁all ▁concerned ▁that ▁he ▁would ▁toler ate ▁no ▁sed ition ▁and ▁all ▁found ▁guilty ▁of ▁sub vers ive ▁activities ▁would ▁be ▁de alt ▁with ▁har sh ly . ▁He ▁ad vised ▁people ▁to ▁behave ▁as ▁true ▁Muslim s . ▁ ▁But ▁he ▁soon ▁found ▁that ▁he ▁was ▁hel pl ess ▁and ▁the ▁prisoner ▁of ▁the ▁people ▁who ▁didn ' t ▁obey ▁him . ▁The ▁cal i ph ate ▁had ▁come ▁to ▁him ▁as ▁the ▁gift ▁of ▁the ▁reb els ▁and ▁he ▁didn ' t ▁have ▁enough ▁force ▁to ▁control ▁or ▁pun ish ▁them . ▁When ▁some ▁people ▁asked ▁Ali ▁to ▁pun ish ▁those ▁who ▁killed ▁U th man , ▁Ali ▁answered , ▁" How ▁do ▁I ▁have ▁the ▁power ▁for ▁it ▁while ▁those ▁who ▁assault ed ▁him ▁are ▁in ▁the ▁height ▁of ▁their ▁power . ▁They ▁have ▁superior ity ▁over ▁us , ▁not ▁we ▁over ▁them ." ▁While ▁A ' ish a , ▁Tal h ah , ▁Al - Z ub ay r ▁and ▁Um ay y ad ▁especially ▁Mu aw iy ah ▁I ▁wanted ▁to ▁take ▁reven ge ▁for ▁U th man ' s ▁death ▁and ▁pun ish ▁the ▁ri ot ers ▁who ▁had ▁killed ▁him . ▁However ▁some ▁histor ians ▁believe ▁that ▁they ▁use ▁this ▁issue