First of all, they can't "just leave" and it's ALL "white property", not just FARMS!
Secondly, they don't have to "salt the earth", the blacks, to whom the land will be given, don't know anything about farming, so nothing will grow anyway, for them.
If someone descended from our very first settlers here was faced with the same problem ( their property confiscated and given to an ILLEGAL ALIEN MS-13 member or Sasha Obama ), not allowed to take much of their money with them, NOT allowed a VISA, just WHERE do you imagine that they could go? That's what the Boers face...only far worse.
I assume you live in SA. I wish you all the best.