Prodi ressurrects referendum!

[Kagemusha]

What I don't understand is what people actually have against the EU constitution?

I think its matter of Principle.People are against the whole EU.While the constitution brings mostly good stuff to EU.The best new thing in my mind is that now if the constitution passes its possible to leave EU.
Here is BBC link that has some simple answers to what the new constitution offers:

http://news.bbc.co.uk/1/hi/world/europe/2950276.stm