from 1931–32, sa brownshirt thugs physically prevented customers from entering jewish shops, windows were systematically smashed and jewish shop owners threatened. during the christmas holiday season of 1932, the central office of the nazi party organized a nationwide boycott. in addition, german businesses, particularly large organizations like banks, insurance companies, and industrial firms such as siemens, increasingly refused to employ jews. many hotels, restaurants and cafes banned jews from entering and the resort island of borkum banned jews anywhere on the island.