The BoS had the right idea in FO3, but Younger Maxon is committed to walking back this affront of the BoS being designated good guys in favor of being hardcore racists and technology hoarders.
With the revelation that the Institute DOESN'T commit this atrocity at the end of the game, I'm a bit conflicted on which ending I like best. Or maybe my son would just make that choice for me and direct the explosion upwards for the good of humanity or something. Having set up a nuclear reactor for the Institute as part of the Railroad's questline, I assumed that if I continued on the Institute questline, the reactor would fail somehow and I'd be given the choice between directing the resulting explosion down into the Institute or up onto the surface. This partially influenced my decision to go with the Railroad ending first. I, like many, was exposed at one point to a spoiler stating that your choices at the end of the game were to either kill your son, who is the villain, or nuke Boston.
Imagine my surprise when the reactor doesn't go critical or something and nuke Boston?
So I just got done with the Institute ending for Fallout 4.
