"Know Thy Enemy" makes very good sense. That would make very easy for many Israelis to travel in hostile Arab countries without being detected. However, from every Arab citizen of Israel it is required to learn Hebrew. If they don't want, they they should lose citizenship and be deported to any Arab countre with some oil in the ground. George S.
U.S. confirms ISIS computer expert killed in air strike (Reuters)
from the article: The language of the state