http://elderofziyon.blogspot.co.il/2014/11/why-are-these-rabbis-wearing-keffiyehs.html#.VYE6KvmqpBcEvery seven years, the Torah commands that land that belongs to Jews in Israel not be sowed or harvested. This mitzvah is known as shmitah. When modern religious Zionists started farming, they came up with a legal fiction/loophole of selling the land to a non-Jew to be able to continue to work the land and sell the produce.
This year is a shmittah year.
In more recent decades, many haredi Jews decided they didn't want to use this loophole any more, so they essentially do not farm - or buy - produce of Israel during this year.
These rabbis struck agreements with dozens of Jordanian farmers to buy produce from them this year. They have been going there every month or so to inspect the crops. But the Jordanian authorities as well as Israeli police told them, for their own safety, not to walk around the kingdom looking like rabbis, especially with the Muslim Brotherhood being active in the kingdom. Wearing the keffiyeh makes them look a bit like village elders, so it is a reasonable disguise.
Arab newspapers around Rosh Hashanah, but Israel's Kikar HaShabbat had a story on it this week that was picked up by more Arab media.
One comment on the article above. There are Haredi Jews that were always against the solution of selling the land to non-Jews for the Shmitta year. It isn't a recent thing.
In normal situations it is a violation of the Torah selling the land of Israel to a non-Jew.
I hold the above Haredi solution for shmitta is a big violation of halacha.
A Jew is not supposed to dress up in clothing uniquely identified with a Gentile nation for economic reasons. I consider it economic because they could have found other solutions for the vegetables they wanted. Nothing was forcing them to trade with Jordan.
Also Jordan is a Hamas supporting enemy. Why endanger the life of Kashrut supervisors and aid the economy of the enemy?
In any case the following Hebrew article said:
Some of these supervisors were attacked as part of a labor dispute in Jordan to put pressure on one of the sides
http://www.93fm.co.il/radio/205921/