A gypsy stole on of the nails intended for Christ's Crucifixion. As a result the Rom were given permission to steal from the gadjo - until He returns.
They rely on oral tradition and their memory is accurate, for just as Plato feared reliance on offboard storage of memories - books and documents, has damaged our capacity to remember true and important things while storing and conserving records of injury and injustice, error and emotion.
Easily manipulated written records made it possible to introduce fake history. To know the truth about our history we must ask peoples with living oral traditions, who don't read or write, who don't go to school watch movies or TV – peoples who have largely escaped the lies of history.
Written history embodies the myth of progress to keep NPCs in their cubicles, the dead in their graves, and set fools who follow collective nouns at each other's throats.
https://www.ushmm.org/m/pdfs/2000926-Roma-and-Sinti.pdf