Remember that in 1948, only 40,000 people were living in Gaza and then after the European Jews began committing horrific crimes against the Palestinians who were living in what they called ‘ Israel’ today, 200,000 fled to Gaza and 450,000 fled to the West Bank. You need to look at this link archived at the United Nations website to understand the extent of the crimes that were committed.
https://www.un.Org/unispal/document/auto-insert-211346/