A few Thoughts
A few thoughts from someone in the West (England) who is married to a Zimbabwean and has been to Zim many times (BTW I am a white conservative, my wife is black).
The comments about Zimbabweans being poorly educated barbarians extremely offensive. If you do some research you will find that Zimbabwe has a higher literacy rate than the UK (93% to 89% approx). Zimbabweans are also some of the friendliest people on earth.
White ex Rhodesians who wish it was still Rhodesia call themselves Rhodies, rather than Zimbos who are white Zimbabweans who support majority rule.
There is a small South Asian community in Zimbabwe, but it is very small (though I did attend a wedding in a small rural town where the meal was a curry provided by the only Pakistani family in the town). Malawi has a bigger South Asian population and there are some very good Indian restaurants in Blantyre (not quite Brick Lane but better than many in the UK).
Politics in Zimbabwe is very complicated with different factions within ZANU PF providing a form of democratic debate. I've been to a party at my Brother in Laws house (Etherton Shungu), who is a ZDF Brigadier and a senior ZANU PF official and engaged in one of the more intelligent political discussions I have been involved in. It even included a white farmer (the Brigadier's best friend BTW) who was a Mugabe supporter. Most of the black guys there were MDC. It was a good party and I drank a lot of Mukuyu Pinotage.
Whilst there were both ZANU & ZAPU in the liberation war, I think that the black population did think of themselves as either Mashona or N'debele. After independence this was reinforced with ZANU's repression of Matabeleland with a combination of the North Korean trained 5th Brigade and the (white) Rhodesian Paratroop Brigade & SAS.
This repression goes back to the movement north of the N'debele who were a scion of the Zulu that fled Chaka and defeated the Shona at Bulawayo (N'debele / Zulu for place of slaughter) and captured the Western third of what is now Zimbabwe from the Shona Empire in the 1830's. The Shona empire was vast from the 12th century up to the 16th century ruling what is now Botswana (not the San people desert areas), Zimbabwe, inland Mozambique and parts of Zambia and SA. They trade with the Ming Empire in China and built stone fortresses as big as any being built in Europe at the time (Great Zimbabwe at Masvingo is about the same size as Caernarfon Castle in Wales and was built about the same time). Whilst both N'debele and Shona are Bantu people, the N'debele have a reputation as warriors being a scion of the Zulu, whereas the Shona are farmers and herdsman, though thet were the first African army to defeat a European Army in the 16th century (the Portugese). There is still a desire in some parts of ZANU PF (Mugabe / Mnagwa) to drive out the N'debele in a third Chimurenga (1st was revolt against the British in the 1890's, 2nd was liberation war).
Anyway back to topic I don't think that a Greater Rhodesia was possible due to the overwhelming black majority, especially in Zambia. There are still a lot of whites in Zimbabwe though, and many who left during the farm seizures are buying there way back in. As I have said it is a very friendly country and I feel safer and less living in a 'Big Brother' society than I do in the UK. I can go into Chitungwiza at night and and feel safe far more so than Hackney or Croydon in London. The climate is also a lot nicer than the UK (day time highs usually 20-29 degrees C (though have experienced a high of 10) and nightime lows of 0 to 15 degrees C). This was one of the major factors for whites to settle in Zimbabwe.
We still have a house in Zimbabwe in Kwekwe and it's far nicer and roomier than our house in the UK.