In terms of 3:144, MGA and his ghost writers had always argued that the sahaba knew that Eisa (As) was dead. However, after MGA died, and via BA5 (Barahin-i-Ahmadiyya part-5), the Khalifa, Maulvi Noorudin invented the idea that the sahaba believed that Eisa (as) was alive and were corrected by Abu Bakr upon the death of MGA. This argument can be found in Nusratul-Haqq [‘Help of God’], which is a sub-section of BA-5.
This wasn’t the first time that MGA disrespected the sahaba of Muhammad (saw), MGA disliked the name Fatima and saw it as a sign of sadness and pain. MGA also disrespected Fatima’s (ra) children, Hassan and Hussain. MGA also disrespected Ali (ra). MGA even called the killing of Maulvi Abdul Latif as greater than that of Imam Hussain.
MGA even called Abu Hurraira as stupid (ghabi). Omar Khan explains how Mirza Ghulam Ahmad disrespected Muhammad (saw), Noah (as), Yusuf (as) and Esa (as). Mirza Ghulam Ahmad accused Esa (as) of getting oil massages by adulterous women. Mirza Ghulam Ahmad even said that if the people of Noah (as) had been given the amount of signs that he (MGA) had been given, those people wouldn’t have died terribly.
Scans from the urdu version of BA5
Razi from Ahmadi answers gets mad
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