I took this straight out of wikipedia. Maybe you should challenge it.
It is true that the Arabs didn't muster too many troops for the first attempt. They didn't think the Jews would fight back. Jews were not traditionally known for fighting back and news from events at Warsaw during WW2 had not yet reached the middle east.
But look at the next few wars and you will see what I was talking about.
Wikipedia also doesn't give the numbers for the "irregular Palestinians". There was actually quite a number of them.
Plus the war happened in Israel, affecting the civilian population as well. It's more difficult to defend than to attack, if the enemy cares mostly about killing.
Although, I did make a mistake. I did not realize that Israeli history
extended so far into the past. The Jews fought hard for their survival,
and much of that fighting transpired without allied support.
That is true.
And by now you should have noticed that the book you quoted about American support for Israel covered the years long after those events. The fact is that since America helped Israel, the country hasn't been attacked as often and as hard any more. That's this "peace" thing that everyone is so much in favour of. The book you quote criticises peace (or rather the non-violent means to keep it). That alone I find suspicious.
""We shall not enter Palestine with its soil covered in sand, we
shall enter it with its soil saturated in blood" - President
of Egypt, Gamal Abdel Nasser, 1965
“Those [Jews] who survive will remain in Palestine. I estimate that
none of them will survive.” - Ahmed
Shukairy, chairman of PLO in Jordanian Jerusalem, 1967