The Workers Circle took part in a rally last Wednesday at Boston's City Hall, advertised by a flier declaring that "Boston Jews demand a ceasefire and a stop to genocide."
This would not be the first attack attempted on Economy Minister Barkat.
The delegation's arrival in the midst of the State of Israel's 75th anniversary signified the strong connection between American Jews and Israelis.
The case had been a source of fear and confusion in the local community for months.
According to an exclusive interview, an ex-Israeli counter-terrorism advisor to prime ministers says Hezbollah has a list of targets.
For Boston-area Jews who immerse ritually on a monthly basis, in keeping with Jewish tradition, the closure could be a significant interruption.