By Holger Hansen and Stephen Brown
BERLIN (Reuters) - Italian President Giorgio Napolitano cancelled a dinner with the German opposition's chancellor candidate in Berlin on Wednesday after he described Italy's former premier Silvio Berlusconi and comic-turned-politician Beppe Grillo as "clowns".
Peer Steinbrueck, a Social Democrat who will take on Chancellor Angela Merkel in Germany's next national election in September, has a reputation for gaffes and his remark created the first diplomatic incident of his accident-prone campaign.
Steinbrueck said on Tuesday he was "appalled that two clowns have won" Italy's February 24-25 election. The vote was actually inconclusive with no party garnering a majority in parliament, although Grillo's anti-establishment party surged dramatically.
President Napolitano, an 87-year-old former communist with no natural affinity for Berlusconi or Grillo, made clear that as head of state he would brook no insults to national pride.
"We respect, and naturally we demand respect, for our country," he said in an emotional speech to members of the Italian community in Munich, the first stage of a state visit that includes talks with Merkel in Berlin on Thursday.
"Our country has serious problems in its structure and daily life ... It has darkness but many lights, and you can be proud," he told his compatriots, stifling a sob.
Italian media said Napolitano, who now faces the difficult task of trying to appoint a coalition government, had expressed concern about "populism" after the election during a private meeting in Germany. These reports could not be confirmed.
The German candidate's spokesman said Napolitano cancelled "because of Steinbrueck's remarks on Tuesday". Steinbrueck had called the president on Wednesday to "clarify" his remarks, he said, adding that the two men had a "friendly" conversation.
Steinbrueck later told a news conference he understood Napolitano's need as head of state to remain neutral and above party political mud-slinging.
Steinbrueck made it absolutely clear in his comments to an SPD rally in Potsdam he was referring to Grillo and Berlusconi, calling the latter "clearly a clown with a testosterone boost".
"My impression is that two populists won," he said.
Berlusconi, a scandal-ridden billionaire media mogul, is very unpopular in Germany and often slated in the media.
But Steinbrueck did himself no favors with his frank talk.
German politicians are expected to strike a serious tone and refrain from interfering in the internal affairs of European partners. On Twitter, some commentators dismissed the acerbic Steinbrueck as the "real clown".
"Steinbrueck behaves like a bull in a china shop," said Michael Meister, deputy leader of Merkel's conservatives in the Bundestag (lower house of parliament).
He accused Steinbrueck of damaging Germany's reputation abroad and some SPD politicians were also critical.
Italy's elections, which threaten to tip the euro zone back into crisis, showed a big swell in support for Grillo's 5-Star Movement and a strong result for Berlusconi. Many had expected the former prime minister to lose heavily to the center left, which won the lower house but not the Senate.
Both Grillo and Berlusconi campaigned against the austerity measures implemented by technocrat Prime Minister Mario Monti at the urging of Germany's conservative chancellor Merkel.
Grillo, in his popular blog, laid into Merkel for imposing German-style fiscal austerity on Italy. Berlusconi has made more personal attacks on Merkel, whom he blames for his fall from power in 2011 because of her hesitancy on bailouts.
Berlusconi, who has been sentenced for tax fraud and is on trial accused of having sex with an under-aged prostitute, is reported to have made rude remarks about Merkel's appearance in a phone call wiretapped by investigators, though he denies this.
Merkel is more diplomatic than the acerbic Steinbrueck, a former German finance minister whose campaign for the election in September has got off to a poor start.
Steinbrueck made waves with undiplomatic statements when he served as finance minister under Merkel between 2005 and 2009, for example referring to the Swiss as Indians running scared from the cavalry during a crackdown he led on tax havens.
(Writing by Stephen Brown; Editing by Gareth Jones and Andrew Heavens)
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