There are several issues here and the first that should be mentioned is the poorly constructed plot line and staging. It is not really the fault of Fallout 4 but appears to be a problem with all games to some extent and that any film that presented inconsistencies like the mysterious appearance of barrels of nuclear material everywhere, the fact that after 200 years no one has done what the lone wanderer is doing - building settlements, villages and towns to protect the public to ensure safety, survival of the human species as well as food and water security, would make that film an instant box-office failure. It's a bit like us being traumatized by the Napoleonic wars which ended in 1815 and we have settlers turning up as if the bombs had been dropped two weeks ago. When you add to this the immersion breaking building system where I don't even know where I am supposed to suspend my disbelief - am I dragging rusty sheets of iron, broken drawers and gore-soaked bedding and couches back from garbage heaps and the "building" is merely a game cost mechanic? Or am I actually chopping down trees, melting down steel, and making other raw materials to create this 200 year old garbage? As for painting Power Armor, that's "Walking on water" stuff. How am I able to paint Power Armor to achieve the 200 years of fading and scratches?
When you add poorly fleshed out factions onto this, threads like this BOS discussion become rather amusing. Does the world require a force of maniacs believing in the Brotherhood flying around in their helicopters saying "I love the smell of napalm in the morning" while listening to "ride of the Valkyries"? Probably not. Could the Brotherhood ever have a hope in hell of winning anything? Unless they take ground, not a hope. Taking ground is about building settlements and societies that support their actions, provide food, water, conscripts, manufacturing, etc. Without that they can win battles but they can't win wars. Realistically, (and that seems to be missing from this game) they would have made every effort to align themselves with the Minutemen, supporting them, inviting them to their Christmas parties, and including their leaders in their planning since their entire campaign of battling Super Mutants, Ferals, Synths, and and Raiders depends entirely upon a civilian militia and constabulary spreading and maintaining a normal society behind a front line. The only way to fight raiders is to ensure that there are much better alternatives to living in toxic ruins in filth and fighting over 200 year old sweet rolls.
But the most disappointing aspect are the missing dialogue opportunities. According to BOS, it's all the scientists fault like they weren't contracted to the military making whatever the military demanded of them... BOS are collecting technology so that humanity can't hurt themselves and can continue to live for another 200 years in filth and squalor. Really? The things I wanted to say about that and about the BOS fanaticism concerning war as the only solution for a war-torn planet just weren't there.
Then there was the Railroad. A faction that had a worthy goal but had no foundation. A being who wants freedom and rejects slavery whether born or made is sentient enough to have rights. This was just another obvious thing I never got the opportunity to voice. Just as the minutemen were created from history so to the Railroad had similar roots but unlike the Minutemen, the Railroad had no social foundation or at least it was not fleshed out. And into this crazy mix we have Nick Valentine, a synth who is loved in Diamond City... Why?
But the most disappointing aspect of the game for me was the Institute. How I would have loved to have asked the acting head of Synth Retention how he had managed to solve the mystery of life - the most important issue of mankind. After all, if he knew that Synths weren't truly sentient then he must fully understand what sentient life is. For a scientific mind, the man was a moron but I never got the chance to explain this to him. But my frustrations turned to anger and I had to walk away from my PC after my initial conversations with "Father". This was a pivotal point in the story line and my dialogue options were all weak. How about, "You are asking me to side with you but you are kidnapping and murdering people up there!" While this line of dialogue does begin, Father responds with "We tried helping them but they attacked our robots" or something like that and there that line of dialogue ends. I wanted to say, "So what! You say they are machines, build more!!!" Build mechanized farms to feed people and they'll come around." I wanted to ask, "What were they playing at? How is secretly replacing the human population with replicas good for the human population? Why are you creating synth children who can never grow up because that is just plain stupid? Why are you hunting down escaped synths when their successful assimilation into human communities without fear of being discovered and reclaimed by you would lead to them being honest and open with the communities they join and aid you with public acceptance? How can you even ask me to side with you when you can't even tell me what these great breakthroughs that will change everything actually are? Are they merely more actions to kill people? Because that is your track record. And, of course, because of the twist there was a lot more I wished to say and never could. Perhaps there were more opportunities to later on. Perhaps many of these options came up but because Bethesda made further investigation and dialogue impossible without making me "kill on sight," or at the very least, lose all possibility of further advancement in the Railroad, the Minutemen and BOS, I couldn't go talk to Father after completing "Institutionalized". In fact, I was forced to start shooting scientists just to get banished and that disgusted me.
So, when you ask if BOS are racists I have to respond with, "No, they are cardboard cut-outs".