Hani Tahir has explained this already.  We are simply re-posting the exact reference.

Related Essays

– Mirza said: “Shaykh Ghulam Dastaghir is fond of Takfir. So I preach to him that the number of my group after the Mubahalat of Abdul Haq al-Ghaznawi has reached 8000 thousands person… for this reason.” Ishtiharata (25-1-1897)

The scan