The entrance to the Yad Vashem Holocaust Museum in Jerusalem was vandalized overnight.
Museum workers discovered the damage upon arriving on the premises Monday morning.
According to available details, unknown vandals sprayed graffiti reading "Hitler, thanks for the Holocaust" and "If Hitler didn’t exist the Zionists would have had to invent him" on one of the walls.
Some 10 other slogans of the same nature were daubed in several other areas as well, including "Israel is the secular Auschwitz of the Sephardic Jewry," and "Jews wake up – the Zionist regime is dangerous."
One of the slogans was reportedly signed "The global Zionist mafia" and another was signed "the global haredi Jewry."
Avner Shalev, chairman of Yad Vshem, said: "I'm appalled by this blatant act of hatred towards the state and towards Zionism. This has crossed a red line. I've informed the education minister of this incident and he too was outraged."
'Neturei Karta not involved'
Despite the supposed radical-haredi indicators to the incident, it was denounced by the extremist Neturei Karta sect.
Mordechai Hirsch, one of the sect's leaders, told Ynet that Monday's vandalism was not the work of any of the group's activists and pointed the finger at the radical Right, suggesting the incident was in fact a "price tag" act.
"None of our people were involved in this," he stressed. "But I can't comment on something I haven’t seen for myself."
Another source, affiliated with the extremist Eda Haredit sect, said that while some may identify with the similar acts, none in the sect would endorse vandalizing a place like Yad Vashem.
"These kind of slogans are beneath even the biggest anti-Semites in the world, he added. "This was probably done by the lunatic fringe – and they don’t represent anyone. These people are truly sick."