In reality, you always have to make compromises. Pure democracy, in which the vox populi is total imperative must lead to isolationism in todays multi-faceted, complicated world. The best IMO best way to deal with todays world is the parlamentary democracy, where the citizens decide on the big questions and choices of direction while the technocrats try to work things out as close as possible to the stated choice of the electorate.

Picking out a tiny fragment of a big international treaty with many interested parties and rejecting that after the fact is childish.