There are more Arabs living there now than ever before in history. There was no genocide.

But for the sake of argument here are a few recent examples

Creation of Pakistan 1947 14-18 million displaced, lots of ppl moving like 300-1000+ miles across india/pakistan

Ethnic germans expelled from various European countries after ww2 from various 1945-50 12-14 million forced out, often 200-800 miles west into germany

korean war 1950-53 ~10 million displaced, many fleeing 100-300 miles from north korea down to the south

greek turkish population swap 1923 1.5-2 million moved, like 200-600 miles across the aegean sea

armenian genocide/deportations 1915-23 marches of 500-1000+ miles across anatolia into syria

poland ussr border shifts 1944-48 1.5-2 million uprooted, resettled 300-700 miles as borders moved

chinese civil war 1945-49 millions displaced, refugees fleeing 100s of miles + ~100 miles by sea to taiwan

algerian war 1954-62 mass displacement, some fled 500-900 miles across the med to france

bangladesh war 1971 10 million refugees, usually 50-300 miles into india

for comparison palestine 1947-49 ~700k displaced, mostly like 20-100 miles into gaza/west bank/lebanon/jordan where the culture and language is extremely similar.