Anti-Semitism: Replacing Stars in Flags

In the web page of Stephen Roth Institute for the Study of Contemporary Anti-Semitism and racism at Tel Aviv University there's a paragraph about ANSWER  anti-war rallies. 

Ob one of these with approximately 200,000 people, held on 20 April 2002 in Washington DC, Called the “National March for Palestine against War and Racism there were the Israeli flag with a swastika replacing the Star of David and a US flag with a Star of David replacing the 50 stars and the message, “Free America".