Answered by Sayyidi Habib Umar bin Hafiz (may Allah protect him and benefit us by him)
What should we do if our Shia friends invite us to one of their gatherings on Ashura?
We tell them that there are sunnahs which the grandfather of Sayyiduna al-Husayn taught us to implement on this day. If there is anything prohibited that takes place in the gathering, such as people hitting themselves or cursing the Companions, then we cannot attend. Continue reading On Ashura Gatherings