I found the text to "We and Our Neighbors", but it doesn't seem to have been translated out of Hebrew. If you know Hebrew, have a look here. Unfortunately, google translate does a number on this, and makes it unreadable.

But what's more important is that their opinions are from different eras. Jabo's thesis in The Iron Wall seems to be that Arabs would oppose Zionism. And by the time Ben-Gurion was on the scene, that was fairly plain reality. The Iron Wall was written in 1923. Ben-Gurion wasn't leading much in 1931 when he wrote Us and Our Neighbors, but by then Arab resistance to Zionism was essentially reality.

I think you may want to compare to somebody somewhat earlier if possible.

Jewish state in Israel/Palestine (By the way, what's the politically correct term when refering only to the land?)

People do get very silly about terminology here. Israel/Palestine is, to me, unnecessarily complicated. Referring to the region as Palestine was a mostly neutral term during the era we're discussing. Simply calling it Israel is anachronistic, though the Land of Israel for the region is had lots of currency in the Jewish community (and the British put it parenthetically on money in the Mandate period). But people absolutely would've talked about "a Jewish state in Palestine". It's later references to Palestine after Israel's been established that get a bit dodgy, because then Palestine starts to ideologically charged. People sometimes use "the Holy Land" or "the Southern Levant" as a neutral geographic term, though to me the former is religious and the second is euphemistic.