So a small minority of Hindus in Muslim-dominated regions killed/disappeared nearly twice as many Muslims as they lost themselves? That seems unlikely.
"The bloody partition of India resulted in Old Delhi losing over two-thirds of its Muslim population. Laurent Gayer says that Delhi’s Muslim population shrank from 33.22 percent in 1941 to 5.71 percent in 1951 as many Muslim families migrated to Pakistan (2012, 217)."
"An estimated 642,000 [Gujarat] Muslims migrated to Pakistan, of which 75% went to Karachi largely due to business interests. The
1951 Census registered a drop of the Muslim population in the state from 13% in 1941 to 7% in 1951.
[127]"
"With the exceptions of
Jind and
Kapurthala, the violence was well organised in the Sikh states, with logistics provided by the
durbar.
[136] In
Patiala and
Faridkot, the Maharajas responded to the call of
Master Tara Singh to cleanse India of Muslims. The Maharaja of Patiala was offered the headship of a future united Sikh state that would rise from the "ashes of a Punjab civil war."
[137] The Maharaja of Faridkot, Harinder Singh, is reported to have listened to stories of the massacres with great interest going so far as to ask for "juicy details" of the carnage.
[138] The Maharaja of
Bharatpur State personally witnessed the cleansing of
Muslim Meos at Khumbar and
Deeg. When reproached by Muslims for his actions,
Brijendra Singh retorted by saying: "Why come to me? Go to Jinnah."
[139]"
"Even after the 1951 Census, many Muslim families from India continued migrating to Pakistan throughout the 1950s and the early 1960s. According to historian Omar Khalidi, the Indian Muslim migration to West Pakistan between December 1947 and December 1971 was from Uttar Pradesh, Delhi, Gujarat, Rajasthan, Maharashtra, Madhya Pradesh, Karnataka, Andhra Pradesh, Tamil Nadu, and Kerala."
"Lawrence James observed that "Sir Francis Mudie, the governor of West Punjab, estimated that 500,000 Muslims died trying to enter his province, while the British High Commissioner in Karachi put the full total at 800,000. This makes nonsense of the claim by Mountbatten and his partisans that only 200,000 were killed": [James 1998: 636].
[112]"
"During this period, many alleged that Sikh leader
Tara Singh was endorsing the killing of Muslims. On 3 March 1947, at
Lahore, Singh, along with about 500 Sikhs, declared from a
dais "Death to Pakistan."
[113] According to political scientist
Ishtiaq Ahmed: 'On March 3, radical Sikh leader Master Tara Singh famously flashed his
kirpan (sword) outside the Punjab Assembly, calling for the destruction of the Pakistan idea prompting violent response by the Muslims mainly against Sikhs but also Hindus, in the Muslim-majority districts of northern Punjab. Yet, at the end of that year, more Muslims had been killed in East Punjab than Hindus and Sikhs together in West Punjab.'
[114][115][116][117]
"Nehru wrote to Gandhi on 22 August that, up to that point, twice as many Muslims had been killed in
East Punjab than Hindus and Sikhs in
West Punjab.
[118]"
A LOT more Muslims left India outside of just Punjab and Bengal, and it was often due to quite organized, explicit violence.