Despite approving a four-month extension to Greece's bailout on Friday, Germany's frustration with Athens' financial demands is palpable.
The German public is angry about Greece's latest bailout demands because the country's government has been "insulting" during negotiations, Michael Fuchs, the deputy chairman of Germany's ruling coalition CDU/CSU parliamentary group, told CNBC.
"It's a bit (to blame) on the Greek government and particularly (Finance Minister Yanis) Varoufakis, who came up with some wordings which were not (appropriate) for someone who is demanding… money," Fuchs told CNBC in Berlin Thursday.
Fuchs but said public opinion did not appear to be behind the extensions to Greece's bailout. On Thursday, the widely-read German newspaper Bild Zeitung launched a campaign against the bailout deal with the headline "Nein," and encouraging its 2.5 million readers to protest the extension.
Spoof song
Varoufakis has become something of a cause celebre in German popular culture of late. This week, a well-known TV comedy show uploaded a spoof song, "V for Varoufakis," to YouTube, parodying the tense relationship between Europe's largest economy and the most indebted one.
Fuchs said Varoufakis' negotiating style during the talks with Germany had not been appropriate, and had contributed to the German people's disapproval of the latest bailout drama.
"He shouldn't handle our Finance Minister (Wolfgang Schaeuble) or Chancellor (Angela Merkel) like he did. It was quite insulting (to) our people and that's one of the reasons the Germans are pretty upset with the situation," he said.
Relations between Germany's Scheuble and his Greek counterpart Varoufakis got off to a shaky start earlier this month when the two men could not even "agree to disagree" over the future of Greece's bailout.
To date, the indebted country's financial aid has totaled 240 billion euros ($272 billion) and Germany – Greece's largest creditor – has taken a tough stance against more leeway for Greece and its new left-wing government.
'Not fair…not clever'
Greece's Syriza-led government came to power just a month ago after campaigning on an anti-austerity, anti-bailout manifesto. As the end of its bailout loomed, however, Varoufakis and Greek Prime Minister Alexis Tsipras appeared to changed tack and requested a bailout extension while promising to make new reforms.
There have been ongoing reports of increasing tension between the Greek and German officials, with Schaeuble reportedly irritated with Varoufakis' comments earlier this week that Greece could once again request a debt haircut. On Thursday, Schaeuble told conservative lawmakers that Varoufakis' recent remarks put "strains" on European solidarity, Reuters reported.
Fuchs said it was not Varoufakis' "most clever statement."
"It was not a good idea just one day after we agreed the extension of the bailout package to come up with these kid of sentences It's not fair and it's not clever. He needs to rethink his wordings," he told CNBC.
With media reports suggesting that Greece could need a third bailout package, the situation looks unlikely to improve any time soon.
Whatever the resolution, Greece has only four months to implement a raft of new and complex reforms, such as combating tax evasion and reforming the labor market.
Markus Kerber, chief executive and director of the federation of German industry (BDI), told CNBC Friday that political turmoil in Greece was "unsettling" for Germany and the rest of the euro zone.
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"What worries us it the unsettling moment and unsettling ideas that we see from the new Greek government, because basically Europe is all about rules and contracts and honoring those contracts," said in Berlin Thursday.
"If you take a look at those countries in the euro zone that have honored their contracts, they're on a rebound but I don't see enough signs from the Greek government that they want to follow down the same path."
- By CNBC's Holly Elylatt, follow her on Twitter @HollyEllyatt. Follow us on Twitter: @CNBCWorld