It's pretty much irrelevant what happened in 1948. The status quo is very different.
Israel was attacked again in 1973, 1991, 2006. They suffer regular rocket and terror attacks to this day.
It's also hard to blame all aggression in the region on the Israeli (Jews) when we recall that they were attacked by all neighboring nations as soon as they tried to find refuge in Israel, before there was any history of hostility.
Simply put: Israel's neighbors targeted it for destruction from day 0.
Carving a piece of land pretty much unilaterally, against the wills of those living there, is already an act of hostility.
In any case most of the rest of the region was carved up by the occupying European powers in much the same way, including the creation of Lebanon, Syria, Jordan, and Iraq.
[1] https://en.wikipedia.org/wiki/Demographic_history_of_Palesti...
[2] https://en.wikipedia.org/wiki/United_Nations_Partition_Plan_...