Americans are not aware of things outside the United States.
Yeah, I think that even those far leftists americans who considered themselves anti-american have a very USA based worldview, which usually forgets non american history.
This reminds me how the RNRHOF tries to be 'diverse' getting non rock american inductees, while forgetting about rock artists from big scenes like Mexico,
Argentina, France, Germany, Sweden, Japan, etc.
Back on topic, they could correlate the old Labor israeli party with Scoop Jackson or maybe Lieberman. Cold war libs.