Just the fencing and blockade of land air and sea. Would you leave your country because a different religious group claims that they have a right to your land/community by god?
Please do not suggest that palestinians have no right to the levant. That rude mindset is why so much hatred for the west.
There are three issues wrapped in to your reply.
1. Blockade
Does Israel impose blockades outside of war-time?
2. Defense of one's claimed land
I can't answer for another person the question of when to stay or leave. Too many factors to account for. Sometimes it makes sense to leave and make a home elsewhere. Other times, to stay and fight. Each must decide for himself where the line is drawn.
3. Palestinians right to the Levant.
Nature affords no one a right to land any that can't be defended against encroachment. Within this overarching and unavoidable reality, human societies settle the question through agreement or war.
If, therefore, the Palestinians in Gaza claim a right to the land, those who don't agree with their claim must either be persuaded to agree through diplomacy, or be compelled to agree through defeat on the battlefield. Otherwise their claim is null. That's reality.
The problem faced by the Gazans is that
independently they are in a position neither to negotiate
or expel. And for all the hand-wringing and finger-wagging that is done about their plight, no nation on this planet actually cares about the Palestinians'
claim to the land because no nation will actually help them
secure the land. That applies to the individual, as well as to nations.
Don't misunderstand what I'm saying there. People and nations claim to care about
the Gazans and actually show that they
do care by contributing to their aid. But, at this point in history, until one goes there in person to compel the people in Israel, Syria, Jordan and Lebanon to surrender their land to establish "the Levant," it's all just
lip service to the broader Palestinian peoples'
claim to the land.
I have compassion for all those who suffer in the conflict, but I have
nothing to do with the question of whose land it is. That is for the people to sort out who have the conflicting claims, and for those outsiders who are willing to die for one side or the other. Since before my liftime, there have been precious few of the latter—but no shortage of armchair Palestinian patriots.