3. The ending was a reference to War of the Worlds
Independence Day was pure, dumb fun, but some viewers felt that it veered a little too far to the dumb side towards the end, when Jeff Goldblum realizes he can defeat the aliens by infecting their computers with a virus. Would intergalactic invaders really use Windows?
However, the filmmakers meant for this moment to be a modern take on War of the Worlds, in which the invasion eventually failed due to the aliens’ lack of immunity to our bacteria and diseases. The computer virus in Independence Day was a twist on this idea.
We still find it hard to believe they didn’t have at least one IT guy on hand to deal with these issues, though.