Because there are a lot of issues that can't be resolved solely within our own borders, epidemics, terrorism, war, climate change that the EU should join together to deal with but it is muddled with endless beurochracy and important environmental legislation is getting chopped for the benefit of...
Fundamentally I'm on the left and pro European in the believe that it should be a progressive cause for dealing with social, security and environmental issues. But it ain't working and Cameron's deal weakens that further and as such I am out.