Conservative in europe and conservative in the US does not mean the same thing, neither does liberal.European conservatives would seem pretty liberal to US americans, for example, the preffered coalition partner for Angela Merkels party CDU is the FDP, whcih calls itself the "liberal party".
There are a lot of reasons for why there are a number of (so-called) conservative governments in europe right now.In germany, the socialdemocrats (not socialists) and the conservatives got almostz the same amount of votes with a very slight victory for Merkel, who thus heads a government formed of socialdemocrats and conservatives.In Italy, Silvio Berlusconi retook power because the former center-left government coalition broke apart less than one year after the election.In France, the candidates were probably more important to voters than the party they belonged to, maybe french voters weren't yet ready for a female president.
Try to understand that the gap between liberals and conservatives in europe is not nearly as wide as it may or may not be in the US.Most parties have eroded from their original positions, socialdemocrats are not socialist anymore (they gave up that policy more than 30 years ago) and recently, a german catholic archbishop gave an interview in which he stated that there was currently no party in germany that was particularly close to christian ideals, not even the conservative CDU (the C in the Name stands for christian)
There is also usually no big difference between what socialdemocrat governments and conservative governments do either. Merkel for example isn't really doing anything different than the former SPD government.