All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad is His slave and Messenger.
The people of Al-Koofah asked Al-Husayn to move to them, and they promised to back him and support him. He thought that it was a duty upon him to answer their call, especially as he did not approve of the pledge of allegiance that was given to Yazeed ibn Mu’aawiyah. This is why Al-Husayn refused to pledge allegiance to Yazeed. Some Companions did not approve of Al-Husayn’s departure to Al-Koofah and thought it was a mistake. Therefore, they did not accompany him. Al-Husayn was killed in Karbalaa'. At the time of his death, he was the most noble and the best person on earth. However, that was his fate; to Allaah we belong, and to Him we return.
Allaah Knows best.