1) There has been a nation of Palestinefor quite some time (arguably since the 13th C). There has never been a State of Palestine, though a mandate, such as the mandate of Palestines is supposed to lead to a State. (Check the definition on your dictionary of choice) 2) Your homogenization of "Arabs" is disengenuous. That many Arab nations attacked Israel upon Britain's pullout (as happened in many multinational colonies of Britain) is completely independent from what happened to Palestinians in Al-Nakba. 3) Is it suprising that was largely uprooted, dispossessed of their land, and made to flee their homes in Al-Nakba might lack the ability to have a well-organized resistance? Palestinian-Jordanian relations are not great - and there is certainly no love lost on the ground, and its not like there haven't been clashes between Jordan and the PLO. You will no doubt misread all of these points, and make ahistorical arguments in response. When you do so, I will reply.
Firebomb thrown during demonstration in northern Israeli town of Umm al Fahm (Haaretz)
from the article: Here come the true settlers