Amid high unemployment, and a growing global backlash against foreigners, organisers want them to leave. 25,000 have already done so.

Protesters have told all undocumented foreigners to leave South Africa by Tuesday, ahead of anti-immigrant rallies that many fear will turn violent.

South Africa's national intelligence body said Monday that more than 25,000 people have been repatriated in recent weeks ahead of planned anti-immigrant protests, with many others…