Was it the "best farmland" before the whites developed it? (I suspect not.) Is it "moral" to starve one's own country, to satisfy racial-political abstractions or for any other reason? Is it "moral" to persecute the small percentage of whites who trusted the black government enough to stick around as a politically powerless minority after Rhodesia fell? Will we soon see Soviet style explanations for agricultural failure -- "due to the 70th straight year of unusual weather blah blah blah..." (See, I'm not a racist, I can admit that whites can be incompetent too. Da, konyechno!)
A bumper sticker I've seen in California farm country, any white Rhodesian might appreciate:
PUT A FARMER OUT OF BUSINESS -- STARVE!