When the incidents happened during the battle of Karbala is being told to a human being he feels sad, it is absolutely humane to feel sad, understanding the incident of Ashura does not require a lot of knowledge.
According to historians the battle of Karbala was not a complex incident. The story of Karbala is close to the nature of human beings.
The incident of Ashura is not related to a specific period of time but it is for the guidance of all the free people of the world in every century.
Hujjat ul Islam Murtaza Aqa Muhammadi said that the Ashura is a standard. The nature of human beings can be judged on the basis of it. May be a person is not a believer of Islam but when he listens to the story of Karbala, it will definitely inspire him.
He said that the story of Imam Hussain (AS) is different from other historical events.