Israel did not take their territory. I say this with utmost respect and I am not trying to be funny or anything, but I think you should read about the exact situation border/country-wise when Israel came to be. None of those three countries had to give territory, they lost territory because they attacked Israel. I mean think about it, how could Israel become a country if the entire region was part of other countries? How would that even work?? Like all three countries just watched as an entire nation announced independence in their own borders?
This is what I am trying to say: there was no Palestine at that point. Egypt, Syria and Jordan each controlled a section of that specific land at the time (In addition to their own country borders, this is important) When Israel became a country, during the 3 wars they lost those lands and more . After the 1948 war, they still had a very good chance to announce the country of Palestine in the lands which included Jurasalem. They did not, instead they went to war 2 more times. None of those countries had any interest in a Palestine country. They wanted Israel gone. Then in the consequent years more and more current Palestinian Arabs became stateless due to the PLO war with Jordan, getting booted out of Kuwait after majority of them supported Iraq invasion of Kuwait and of course after each war with Israel. None of the Arab countries wanted/wants to take them in.
