Now a days muslims especially Shia muslims are celebrating the memory of Karbala. To memorise Karbala has become the way to justify the political islam. In modern world it is really condemnable.
Today we are living in a democratic world where every person wants to be judged equally under state secular laws. Imagine if Hussain had a chance to rule the state. Had he not been looting the other small states to make his state stronger & richer ? Was he going to reject slavery especially sex slaves ?
If Hussain was the leader of any state he had been committing every crime to make his state stronger just as his forefathers did.
Staying in the religious paradigm & celebrate the memories of religious personalities is very easy but in reality any wiser person would reject political religion like Islam. I don't know much about other religions but Islam never condemns slavery.