The conflict did not begin on the 7 October. It started in 1948 when Israel evicted 700,000 Palestinians from Jaffa.
Not sure why you keep claiming that, but for clarity, the population of Jaffa in 1948 was around 90,000 of which 28,000 were Jews, so the number of Palestinians who left Jaffa would have been 60 odd thousand.
I say 'left' because although many were forcibly removed, many simply fled because of the 1948 war launched by Jordan, Egypt, Syria and Iraq which lasted around 9 months.
In total around 700,000 Palestinians fled because of the war launched by the Arabs or were evicted.
You seem confused, hope this helps.