Such things did happen. If black Witnesses preached from door to door in a white neighborhood, they would be arrested ​ — and likely beaten up.
بِٱلْإِضَافَةِ إِلَى خِدْمَةِ ٱلْفَتْحِ ،‏ عَمِلْنَا بِكَدٍّ لِنُعِيلَ أَنْفُسَنَا .‏