. ▁In ▁his ▁efforts ▁to ▁spread ▁Islam , ▁he ▁established ▁libert ies ▁for ▁the ▁M aw ali ▁by ▁abol ishing ▁the ▁j iz ya ▁tax ▁for ▁converts ▁to ▁Islam . ▁Im am ▁Ab u ▁Muhammad ▁Ad bul lah ▁ibn ▁Abd ul ▁H ak am ▁stated ▁that ▁U mar ▁ibn ▁Abd ▁al - Az iz ▁also ▁stopped ▁the ▁personal ▁allow ance ▁offered ▁to ▁his ▁relatives , ▁stating ▁that ▁he ▁could ▁only ▁give ▁them ▁an ▁allow ance ▁if ▁he ▁gave ▁an ▁allow ance ▁to ▁everyone ▁else ▁in ▁the ▁emp ire . ▁After ▁U mar ▁ibn ▁Abd ▁al - Az iz ▁was ▁poison ed ▁in ▁ 7 2 0 , ▁success ive ▁govern ments ▁tried ▁to ▁reverse ▁U mar ▁ibn ▁Abd ▁al - Az iz ' s ▁tax ▁policies , ▁but ▁re bell ion ▁resulted . ▁ ▁Sh i ' a ▁opinions ▁The ▁negative ▁view ▁of ▁the ▁Um ay y ads ▁held ▁by ▁Sh ias ▁is ▁briefly ▁expressed ▁in ▁the ▁Sh i ' a ▁book ▁" S ul h ▁al - Has an ". ▁According ▁to ▁Sh ia ▁had ith s , ▁which ▁are ▁not ▁considered ▁authentic ▁by ▁S unn is , ▁Ali ▁described ▁them ▁as ▁the ▁worst ▁F it na . ▁In ▁Sh ia ▁sources , ▁the ▁Um ay y ad ▁C ali ph ate ▁is ▁widely ▁described ▁as ▁" ty ran n ical , ▁anti - I sl am ic ▁and ▁god less ". ▁Sh ias ▁point ▁out ▁that ▁the ▁founder ▁of ▁the ▁dynast y , ▁Mu aw iy ah , ▁declared ▁himself ▁a