When the National Security Agency was caught eavesdropping on German Chancellor Angela Merkel’s cell phone, it was considered a rude way to treat a friend. Now U.S. intelligence officials are saying—albeit very quietly, behind closed doors on Capitol Hill—that our Israeli “friends” have gone too far with their spying operations here.

According to classified briefings on legislation that would lower visa restrictions on Israeli citizens, Jerusalem’s efforts to steal U.S. secrets under the cover of trade missions and joint defense technology contracts have “crossed red lines.”