For Brussels and Berlin any challenge to austerity must be rejected, even if it were to lead to Grexit. Punish Athens to warn Rome, Madrid, Lisbon or any other eurozone's capital
Berlin is not going to force Athens out of the eurozone anytime soon.The objective is to undermine political support for the Syriza government until it falls and get a new regime that is preferable to the European partners and the U.S.