Whoever support Yazid and praised him killed Imam Hussain(a.s.)

Whoever today loves Yazeed and Muawiyah and praises them then his group is the one who killed Imam Hussain
The conversation is nonesense if there is no agreement on the definition of Shia and Sunni and its also nonesense if we want to turn it into a sectarian thing to attack the sunnies of today or the shias of today as they have no direct role in that event.

The shias of Hussain were 72 people plus all the ones who got jailed and persecuted for standing with Imam Hussain and the rest were common muslims, but if we suppose that shias killed Hussain, where  were sunnis ? Why they didnt even invite him or protect him? Hussain was the grandson of Holy Prophet(s.a.w) and most pious and God-fearing person on earth.
 

Well , if you define Sunnis to be followers of Abubakr and Shia to be the followers of Ali, then you can say that Abu bakr gave the leadership to Umar and Umar to Uthman and Uthman made Muawiya the governor of shaam, Muawiya opposed the caliphate of Ali and later became leader by force and  gave it to Yazeed(l.a)  so Abubakr is to be blamed for killing of Imam Husain !!!