I don't know what you guyz are talking about, also i don't know why these things ends up on sect fight. But i really amaze to ask these question. Ok Hazrat Imam Hussaind (R.A) had 72 companion (mostly from kuffa), and they were leading to kuffa. But if you look at map, "Karbala don't come in a way from madina to kuffa.. so what was Hazrat Imam hussain (R.A)'s destination? We heard lot of the stories about how yazeed's army closed water, but interestingly there is no sign of canal, or some other water resource in that ground. I see same madina which came into fight will giving everything to Prophet Muhammad (SAWW) & his companion, but when time comes for Hazrat Imam hussain (R.A), no one came forward, also the kuffa people who actually invited Him (r.a), didn't come for help, after all the whole 10 days the group was surrounded by yazeed's army.
Any how, I prefer to not discuss these issues, since these issues started to divide people into different sectors. while you can see easily faraiz are non different in any sect, aqeedah is same.. so why to bother about the history.. If yazeed was the culprit then Allah will surely punish him, if he wasn't and he was respectable person then Allah give rewards to him accordingly. Why should we even care? Isn't important thing is the faith and following what Allah order us? Why yazeed's faith and fate is more important to us then ours?