They can move to Palestine, a/k/a Jordan. Western money should be made availble to build communities there for these palestininas to join their brethen palestinins. There is plenty of land- over 77% of the Palestine Mandate. If the billions were put into Jordan for these palestinians the conflict would be over, conform to the original idea of the 'two state' solution and there would be no 'refugees'. An Arab state craved out of Judea Samaria is a 'Three State' solution. Add a separate Gaza and you have 'Four State' solution. Jordan and Israel is the 'two state ' solution.
from the article: Red Cross: Israel worsening Palestinian humanitarian crisis