Why do Shias beat upon themselves on 9/10 muharram

Re: Why do Shias beat upon themselves on 9/10 muharram

Lets just say May ALLAH Curse enemies of Ahleybait a.s :), May ALLAH curse each individual who hurt Ahleybait a.s in anyway. May ALLAH curse those who dont send Curse on enimies of Ahleybait a.s and try to protect enimies of ahleybait a.s.