Love, Actually is a celebration of love at its corniest, sappiest, and overly sentimental—completely devoid of cynicism toward the actions of its characters. That's super refreshing at times, even admirable—right up until it isn't. For instance, there's that moment when Britain severs political ties with the United States of America.
No, that isn't a typo. The Prime Minister of England (Hugh Grant) announces on live television, with absolutely zero forewarning, that England's relationship with the United States has gone sour (it's always about relationships in this movie), calls America and its president (played by Billy Bob Thornton, appropriately) bullies, and effectively ends the political relationship between the two countries. Oh, and he does this because President Billy Bob hit on the girl he likes.
It's absolutely insane to watch the way it plays out in the movie. The ramifications of this political move are massive, and yet they are never mentioned again. England and the States have a generally good relationship—save for, you know, that one time. To watch Love, Actually completely upend international diplomacy with no acknowledgement of what it means is extremely weird (if not kind of hilarious in its own right).