Hey, I'm not trying to assign blame! I'm just saying that even if we disagree with the demands of the Palestinians, we can understand them somewhat. The 48 war resulted in 100s of thousands of refugees, who left jewish territory. While the Arab states certainly weren't the "victims" in the war, the refugees were expelled from Jewish held territory.
Refusal to accept that there were nasty things done by both sides is simply denial.
I'm not denying both sides did nasty things for a moment, but your claim that the arab residents were "expelled" from "jewish" territory needs some substantiation.
Many arabs left (temporarily, so they thought) on the advice of the attacking states (Nasser himself I believe). My understanding is others were told to leave; which they did, not lifting a finger to defend their territorial integrity from the invading armies of five different sovereign states. (i.e. they picked to side with the invaders, and the invaders lost)
Now if you can find an arab resident that had his properties forcefully expropriated, while at the same time worked in any capacity to maintain the aforementioned territorial integrity, I'll concede that person has a grievance. But all those arabs holding Israeli citizenship had to come from somewhere.
As for the rest of them, you may as well claim all those distraught democrats out there have a "legitimate grievance" too.