Israeli Prime Minister Benjamin Netanyahu on Thursday described as "shameful" a poem by German Nobel laureate Gunter Grass, which accused Israel of plotting Iran´s annihilation and threatening world peace.

"The shameful comparison that Gunter Grass made between Israel and Iran, a regime which denies the Holocaust and calls for Israel´s destruction, says very little about Israel and a great deal about Mr Grass," he said in a statement.

"It is Iran, not Israel, which presents a threat to the world´s peace and security. It is Iran, not Israel which threatens the destruction of other states," he said.

"It is Iran, not Israel, which supports the massacre carried out by the Syrian regime on its citizens."

Israel´s foreign ministry described the Grass poem as "pathetic." "The transition of Grass from fiction to science fiction is in very poor taste; his poem is pathetic and totally lacking grace," ministry spokesman Yigal Palmor told AFP.

Israel´s Haaretz daily took the same tone, with historian Tom Segev writing that the German writer, who won the Nobel literature prize in 1999, was "more pathetic than anti-Semitic."

"The comparison between Israel and Iran is unfair because, unlike Iran, Israel has never threatened to wipe another country off the map," Segev wrote, referring to 2005 comments by Iranian President Mahmoud Ahmadinejad widely translated into English as meaning the Jewish state should be "wiped off the map."

In Grass´s poem "What must be said," the 84-year-old longtime leftist activist wrote of his concern that Israel "could wipe out the Iranian people" with a "first strike" due to the threat it sees in Tehran´s disputed nuclear programme.

"Why do I only say now, aged and with my last ink: the atomic power Israel is endangering the already fragile world peace?" reads the poem, which was published in the daily Sueddeutsche Zeitung.

Grass, author of the renowned anti-war novel "The Tin Drum," sparked outrage in 2006 when he revealed, six decades after World War II, that he had been a member of the notorious Waffen SS.

Israel, the sole if undeclared nuclear power in the Middle East, has said it is keeping all options open for responding to Iran´s nuclear programme, which it says is aimed at securing nuclear weapons, posing an existential threat to the Jewish state.

Iran has consistently denied that its sensitive nuclear work is aimed at making weapons. (Copyright © 2012 Agence France Presse. 04/05/12)