I recently found this audio of a lecture originally delivered by Shaykh Ehsan Elahi Zaheer (rahimahullah Ta'ala) regarding the Battle of Karbala.
There are many audio out there in which such lectures are used to curse the Sahabah, including Abu Bakr, Umar, Uthmaan (radiAllahu Anhum Ajma'een) and other than them.
Here is an authentic account of that famous battle that we should have a good understanding of to defend the companions of our beloved Prophet Muhammad (sallallaahu 'alaihi wa sallam) from the slanders they are labelled with.
Abu Hurairah (رضي الله عنه) narrated that the Prophet ﷺ said: "Whoever invites to guidance will be rewarded like those who follow him in the guidance are rewarded, and that will not decrease the reward of those who have followed him." [Collected by Imām Muslim]
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