More than 13,000 Conversos were put on trial during the first 12 years of the Spanish Inquisition. Hoping to eliminate ties between the Jewish community and Conversos, the Jews of Spain were expelled in 1492 ..
A second reason, specifically for using Morse Code during the Second World War, was encoding... Nowadays equipment exists to take an outgoing radio signal and automatically encrypt the data or voices during transmission, this is 'on-line' encryption...
Morse code was heavily used for military radio communication on both sides during WWII. German made WWII military surplus telegraph keys (used for sending Morse code) are considered to be very good quality and are still in use by ham radio operators in many countries.