Even after the conclusion of WWII Zionist fulfillment faced enormous hurdles. They British had every intention of maintaining the same blockade of Jews to Palestine which they enforced during the war denying the Jews haven that would have saved their lives. Jewish lives was simply not as important as antagonizing the Arab world and threatening the importation of oil to Britain.  And if illegal immigrants managed to sneak in, the British would capture and deport them. The Patria was crammed with 1800 Jewish refugees that were to be deported from the port of Haifa to Mauritius when a bomb placed aboard caused the ship to instantly sink.