The Arabs did not replace the native peoples of the Levant. The Palestinians turn out to be even more closely related to ancient Levantine people (including ancient Israelites) than most Israelis are. Levantine peoples started speaking Arabic, the same way that Jews in ancient times stopped speaking Hebrew (except in religious contexts) and adopted Aramaic as their native language.

Not that any of this matters. What happened in the 7th Century CE is not relevant to the question of who the native population was in 1900.

> What happened in the 7th Century CE is not relevant to the question of who the native population was in 1900.

but it does. Jewish people have lived in the area for 3600 years, Arab Abs arrived 1600 years later, violently colonising the Middle East and North Africa Africa and violence in the name of Islam remains a global problem to this day.

Judaism hasn't even existed for anywhere near 3600 years, and most Arabs are just local people who started speaking Arabic in the centuries after the spread of Islam (much like the Jews stopped speaking Hebrew 2000 years ago and adopted Aramaic).

One of the weirdest things about this conflict is that the Palestinians are more closely related to the ancient Israelites than many (maybe even most) Israelis.