The decision, prompted by security concerns, comes at an especially delicate time: The war between Assad's regime and the rebels in Syria is threatening to destabilize a border that has remained relatively calm for four decades.
The guerilla Fida'iyyun organizations precipitated the descent to war by destabilizing the border situation, triggering Israeli retaliations, the climax of which came in the Samu' raid in Jordan on November 13 , 1966and the IDF's large-scale operation in Syria on April 7 , 1967
Additional attacks on UN peacekeepers threaten to further destabilize the border region, possibly raising the risks for a spillover of violence into Israeli territory.
"It is not a very tangible threat to Egyptian security directly, although Libya could find ways to boost the Brotherhood in Egypt by destabilizing the border in some way or by providing refuge for Egyptian Islamists," he told VICE News.
The flow of refugees across borders has destabilized the Middle East.
It might also result in the spillage both of conflict and the weapons to pursue it across borders, destabilizing Lebanon, portions of Iraq and potentially Jordan.
But with the Syrian conflict in its third year, the fighting has already spilled over the borders, destabilizing its neighbors, even as Al Qaeda-affiliated rebels play a bigger role.
The Bush administration is reaching out to the Syrian opposition because of growing concerns that unrest in Lebanon could spill over and suddenly destabilize Syria, which borders four countries pivotal to U.S. Middle East policy -- Israel, Iraq, Lebanon and Turkey, U.S. and Syrian sources said.
The fear is that if the conflict spreads across Burundi, armed militias could cross the region's porous borders, destabilizing neighboring countries, in particular the Democratic Republic of Congo.
By smashing the vitriolic Sunni regimes on either side of the modern Iranian state, itself a truncated core of the millennia-old Persian empire, Iran could now vastly expand it's influence among it's destabilized neighbors across their broken borders.
Or you could have the border with Turkey destabilized by the Kurds, and as a result you could have regional conflict develop.
