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Originally Posted by Oling_Roachinen

Sign spoilers, just in case:

Spoiler!

The only way this movie makes sense is the fan theory that they are not aliens but demons. It would follow the religious motifs, explain why the Middle East (Holy lands) were the first to be able to fight back, explain the vision, and then you just have to accept that the little girl is blessing the water. But if it were aliens, then these super advanced aliens were able to travel to Earth, a planet made up mostly of water, but didn't expect to encounter the highly dangerous...water?

But then it's ruined by the bird running into the invisible ship.

Shyamalan's legacy is definitely interesting. Signs, at the time, was praised for it's atmosphere and lack of "payoff" ending, which at that point in time was considered cliche. Meanwhile "Unbreakable", which was largerly panned upon release - and in many ways it's negative performance led to the change of direction in Signs - slowly grew a cult following.