"Anti-BDS laws are legislation that retaliate against those that engage in Boycott, Divestment and Sanctions. With regard to the Arab–Israeli conflict, many supporters of the State of Israel have often advocated or implemented anti-BDS laws, which effectively seek to retaliate against people and organizations engaged in boycotts of Israel-affiliated entities."
From Wikipedia. Also: "Not to be confused with Anti-BDSM laws."
There's obviously a lot more going on from a social/religious perspective, but I'm prone to thinking of large-scale shifts and trends in terms of economic incentives.
The UN declaration was recognition of reality on the ground. And was, btw, rejected by the Arab parties and doesn't carry the force of international law. Israel declared its independence irregardless of the resolution the following year.
https://en.m.wikipedia.org/wiki/Demographic_history_of_Jerus...
In any case, go look at the malaria maps and desert areas. Notice how they match up with the areas allocated to Jews. The Jews may have gotten allocated slightly more land, but it was not fertile or desirable land.