It was very important for Syriza to be seen as absolutely against Grexit.

The idea has to be established in the public minds that, when it happens, the govt did everything it could do. The general sense that I got from Greek voters (who formerly supported ND or PASOK or were now in To Potami's camp) was that they believed Varoufakis and Tsipras wanted out of the euro.

These sensibilities have to be managed. They don't change instantly.

Not to mention the fact that Greeks for the first time saw their politicians as fighting for them, which actually does address the gov'ts popularity.

http://www.latimes.com/world/europe/la-fg-greece-bailout-20150223-story.html

Nevertheless, Tsipras' popularity continues to soar, according to recent polls.

Weekend polls found that more than 80% of respondents said they were supportive of the negotiating stance, while 86% said they felt his leadership had inspired a new sense of national pride.

A separate poll found that Tsipras' popularity rating had risen by 42 percentage points in a month, reaching 87%, the highest of any Greek politician since the restoration of democracy in 1974.