The separation of church and state is vital for both sides. It keeps the government from hording in on people's personal faiths, while at the same time, keeping religious extremist from using the government to push their faith (or lack of faith) on everyone. Its a win-win.
But where do we draw the line?
Their are clear violations of church and state and then there are smaller less obvious possible violations. Such as a politician wearing a small cross pendant or necklace. Would that be acceptable to you? How much separation would you say was enough or even too much?