The Living Movement of Imam Husayn (A)

What was the state and condition of the world of Islam when Imam Husayn (A) rose up and entered the battlefield?
And why was it a crime for a Muslim to be a supporter and lover of the strongest pillar of Islam – Imam Ali (A)?
Besides, what was the character like of the person who had illegitimately taken over the Caliphate of the Muslims?
And what was the biggest spiritual calamity for Islam during that period?
Furthermore, how is the movement of Imam Husayn (A) still relevant in today’s day and age, and what is the Jihad of our time?
And, what is our responsibility in today’s times if we see – once again – that the pulpit of the Holy Prophet (S) is being used to spread corruption and create deviation in Islam?
Moreover, what is the true meaning of commemorating the mourning of Imam Husayn (A)?
And to conclude, what do the pages of history tell us about the end of those people who see the religion of Islam in danger and do not follow the lead of Imam Husayn (A) and stand up to defend it?
The Leader of the Islamic Revolution – Imam Sayyid Ali Khamenei – explains the conditions of the time when Imam Husayn (A) rose against injustice and sheds light on the Jihad of today and our responsibility in the current times.