I don't think it's very hotly debated at all. There seems to be a consensus that whether they were right to be so concerned or not, Israel's motives in preempting Egypt were about security, not territorial expansion. Before the war, Egypt administered Gaza but did not claim it (Palestinians needed something like passports to transit between Gaza and Egypt proper). Jordan was almost kicked out of the Arab League for annexing the West Bank, which it claimed as territory until 1988(!).
There's no question that since the war, Israel has abused its position with respect to the West Bank in particular (it dispossessed Gazan settlers during the disengagement, but has tacitly allowed continued settlement in the West Bank). But the history here is complicated and it's important to get it right.
There's no question that since the war, Israel has abused its position with respect to the West Bank in particular (it dispossessed Gazan settlers during the disengagement, but has tacitly allowed continued settlement in the West Bank). But the history here is complicated and it's important to get it right.