The 1948 Palestinian exodus (Arabic: الهجرة الفلسطينية, al-Hijra al-Filasṭīnīya), also known as Nakba (Arabic: النكبة, an-Nakbah), meaning the "disaster", "catastrophe", or "cataclysm",<1> occurred when between 650,000 and 750,000 Palestinian Arabs fled or were expelled from their homes by Yishuv or Israeli forces, during the creation of the state of Israel and the civil war that preceded it.<2> The term "Nakba" was first used in this way by Syrian historian Constantine Zureiq in his 1948 book, Ma'na al-Nakba (The Meaning of the Disaster).<3> According to Ilan Pappe, the term Nakba was adopted "as an attempt to counter the moral weight of the Jewish Holocaust (Shoa)".<4>
http://en.wikipedia.org/wiki/1948_Palestinian_exodusand yes we are all very aware of the Jews being displaced from Arab countries and finding a home in Israel which it seems had some newly "vacated" space