We call it diplomacy, Minister.

Sir Humphrey: Minister, Britain has had the same foreign policy objective for at least the last five hundred years: to create a disunited Europe. In that cause we have fought with the Dutch against the Spanish, with the Germans against the French, with the French and Italians against the Germans, and with the French against the Germans and Italians. Divide and rule, you see. Why should we change now, when it's worked so well?
Minister Hacker: That's all ancient history, surely?
Sir Humphrey: Yes, and current policy. We 'had' to break the whole thing up, so we had to get inside. We tried to break it up from the outside, but that wouldn't work. Now that we're inside we can make a complete pig's breakfast of the whole thing: set the Germans against the French, the French against the Italians, the Italians against the Dutch. The Foreign Office is terribly pleased; it's just like old times.
Minister Hacker: But surely we're all committed to the European ideal?
Sir Humphrey: [chuckles] Really, Minister.
Minister Hacker: If not, why are we pushing for an increase in the membership?
Sir Humphrey: Well, for the same reason. It's just like the United Nations, in fact; the more members it has, the more arguments it can stir up, the more futile and impotent it becomes.
Minister Hacker What appalling cynicism.
Sir Humphrey: Yes... We call it diplomacy, Minister.

Yes Minister - Antony Jay & Jonathan Lynn - 1987