Rodeonexa

Ok. What if it rose to Honduran levels? Would that be enough, or would the economic benefits to the Palestinian migrants outweigh the QOL decline for the Jewish population? I'm just trying to figure out where this moral presumption's boundaries lie. What level of social immiseration for the existing populace is a step too far? There's quite a gulf between a night in the Bronx and Black September.

"Civil war" is an extreme example of a negative effect. There are more commonplace examples one could think of, such as increased violence and a decline in public safety that do not escalate to the point of civil war. If the Palestinian right of return has the effect of making life in Israel markedly more dangerous for the Jewish population, say through a sharp increase in stabbings, assaults, and acts of terrorism, to say nothing of giving foreign groups such as Hezbollah the opportunity for deeper roots in Israel, is there still a strong moral presumption in favor of it?

I don't think it's a stretch to say American national identity was raw and unformed during a period when the US was still acquiring territory from coast to coast.