There is nothing bad Zardari did, that Shareef won't do if he was in power.
How I know this?
Because Shareef did all that and more, when he was in power.
so what is the democratic attitude?
It is, to accept the current rulers, and excercise your vote 4 years from now. Election is over, so street riots and anti-Zardari slogans, serve no purpose. It can only hurt the country. Opposition should negotiate with the government, knowing that the elected government should have the upper hand. Democratic parties should show democratic attitudes.
If we accept PPP's argument that Nawaz Sharif had limited support from a small region, then all the people protesting are not NS's supporters. Which means that a huge majority of people apart from PML(N) supporters are protesting. Which means that this is not NS v/s Zardari. This is justice v/s dictatorship.