There are records that indicate a small number of people left Egypt, perhaps even in a time frame that might mesh with the Bible. However, this is a far cry from the over a million recorded in the Bible. The same can be said of 30,000 that you suggest may have been Hebrews. Are the people of the area you refer to in 1209 B.C. the Habiru? No direct evidence has ever established a concrete connection between them and the Hebrews.
With no evidence we have no support for the Bible. There should be at least some archeological and written language to support the existence of two very prominent Kings in that area around 1000 and 900 B.C.
A person is welcome to their opinion on these things but without definite multiple lines of evidence, we really can’t say whether much or any of the Bible in these periods is accurate history. It would seem that the Bible is worse off than it was 100+ years ago because the Holy Land has been investigated carefully for archeological evidence for early Biblical historical events and characters (from David and Solomon backward) with virtually no success.