Aliens is the classic Christmas Film, not Die Hard as some people have erroneously
Hidden in the subliminal Occult Layer (only properly exposed in the 5:1 surround sound Blu-ray release) of the film, it’s a modern critique of the futility of the Christian Christmas (as symbolically represented by the Marines – each of whom are an analogy of the different sects of that religion) faced with the merciless onslaught of Consumerism (the Aliens) and need to return to ancient pre-flood Midwinter celebrations (where it was Pyramids not Trees that were erected OUTSIDE the house for obvious reasons) via the vector of BIG FUCKING GUNS! 😛