This is an interesting post, as it came from this Israeli news site that until a few months ago appeared to be extremely hawkish. It seems to recognize that a similar program has been launched by Gush Shalom and suggests that the Arab League cooperate with "leftist Israeli lawyers." Guysen, Francophone agency in Israel, reports:

The Arab League is finally figuring out that there may be legal steps to take to prevent fund raising in the United States for the West Bank settlements. The League has called on President Obama to prevent groups such as the ”American Friends of Ateret Cohanim” from transfering millions of dollars in tax-free funds to radical settler groups for the purchase of Arab property in East Jerusalem. The strategy of fighting legal battles and tax fraud with lawyers, and why not with leftist Isrraeli lawyers is something that the Palestinians and the Arab League must explore. It could be much more effective than throwing stones.

The "American Friends of Ateret Cohanim" is headed by millionaire Irving Moskovitz. He made his money with bingo parlors and by stripping down health centers and selling them, in short, dirty money. Most Israelis do not like this group, and see them as radical instigators against peace, but when violence erupts, the lines are drawn.