This is an extremely well-written and well-produced episode with a great story. However, I think the message would have been even stronger had it had a different ending.
If instead of cutting away to the aliens at the end, there was a cutaway to a control room at some government agency where engineers were talking about how a new satellite just went awry and was disrupting communications and power in a small town somewhere. Then it would have turned out that the source of the chaos on Maple St. was simply ignorance, and not extraterrestrial in origin. This would have been much closer to reality since ignorance has always been the main source of hatred and conflict since time immemorial.
If instead of cutting away to the aliens at the end, there was a cutaway to a control room at some government agency where engineers were talking about how a new satellite just went awry and was disrupting communications and power in a small town somewhere. Then it would have turned out that the source of the chaos on Maple St. was simply ignorance, and not extraterrestrial in origin. This would have been much closer to reality since ignorance has always been the main source of hatred and conflict since time immemorial.