Molana Ubaidullah Sindhi Once Said,

“Studying Muslim History,U will see several personalities were declared  as Heretics…..These were the peoples who were against the  common adopted approaches of tht times in  Society.The ruling classes were used to these mindsets and have their own intersts in promoting it.So when someone comes in contrast,the pro establishent religious intelligensia have come to the oppose it.And for this they have used religious terms and sentiments.A voice for social,political and economical change had transformed to religious debates and clashes….Most of the school of thoughts were acclaimed as Heretic in the process and gave rise to sectaranism….”