There was no entitlement. A charter was granted with specific requirements that the Arabs be treated fairly. Within the first year many Western nations reacted to the treatment of the Arabs. Since then Israel has ignored the requirements of that charter and have engaged in a colonial exploitation of a defenseless people. Much of what Israel does today to the Palestinians violates International Law and the Geneva Conventions. Israel has shown disdain for Western and Jewish values. For that reason, it is preoccupied with security rather than asserting it's legitimacy.
High Court: Illegal West Bank homes to be demolished (Haaretz)
from the article: Reasserting a legitimate claim