Pro-Palestinian graffiti has been daubed on the Holland Road synagogue in Hove.
The words Free Gaza were sprayed onto the wall of the Hove Hebrew Congregation’s home in the early hours of last Saturday morning.
The graffiti was examined by Sussex Police forensic officers who are investigating the crime.
Dr Winston Pickett, security officer and board member of the Hove Hebrew Congregation, said: “The leap from anti-Zionism to anti-Semitism is short.
“While the slogan daubed on a Brighton and Hove Synagogue was not in itself anti-Semitic, its location suggests otherwise.
“This was a hostile, aggressive act and one which has deeply upset the community.
“To blame local Jews for what is happening in Israel’s efforts to protect itself is a form of Antisemitism — something that Sussex Police have taken very seriously and have been brilliant in responding to.”
— Ian Cohen (@Ian_Coh) August 9, 2014
The graffiti was gone by the end of the weekend after a painter and decorator who passed by the synagogue was shocked by what he saw offered to paint it over.
Alan Bloomfield, of Obsessive Compulsive Decorators, was on his way home to Lansdowne Road at 3.3am after night fishing on the beach when he saw the slogans.
He said: “I was going past and I saw the graffiti. My dad’s Jewish, and I was very upset at what I saw – not just one slogan, but two.
“I called up the synagogue and said I’m a painter and decorator and I want to paint over it straight away.
“I waited for the forensics to clear and I did the first coat on Saturday afternoon, and then another on Sunday morning, when I cleaned the security cameras which had been painted over too.”
Sussex Police said no similar reports had been made in the city. No arrests have been made.