Playing Fallout 4 and... yeah, I don't see why everyone compares the BoS to the Enclave. The BoS hates mutants and ghouls, but you never see them stomp into Goodneighbor and purge the place. Hell, you never even find them burning ghoul corpses in an old grain silo like you found with the Enclave in Fallout 3.
The Brotherhood has ALWAYS hated mutants and ghouls to some extent, but they only really went after the muties because they were a threat. They mostly leave ghouls alone so long as the ghouls keep to themselves.
I'd say the Fallout 4 BoS is a lot more like the Midwestern BoS without the accepting ghouls, muties, and talking deathclaws shit. They actively patrol the Commonwealth and engage hostiles, they are willing to recruit from the wasteland, and they expect payment in food for their protection.
The problem is that they are incapable of considering any sort of compromise. Its their way or the fucking highway. Paladin Danse is revealed to be a synth but even he himself didnt know, Maxson doesnt care and demands he gets executed, no matter how much he is reminded of how much Danse has sacrificed for the brotherhood without question, how many times he lead brave men and women to their deaths in Maxson's name. None of that mattered. At best you can convince Maxson to "exile" Danse and for him to never return to the brotherhood.
You cant help but feel sorry for Danse and kind of hate Maxson for it. He represents the type of mentality that will be the death of the brotherhood sooner or later. Their incapacity to compromise with the world around them. The ghouls and mutants arent going anywhere and the fact they cant even entertain the idea that having a radiation proof member on their ranks is kind of stupid (but it makes sense that its all going into their pride).
The only reason the brotherhood of Steel was able to thrive is because they didnt have the NCR to worry about and they had some convenient kid from Vault 101 to deal with most of the problems at TCW. The BOS then took all the credit and resources and were able to grow unchecked given the lack of adversaries.
The Brotherhood isn't even the most anti mutant faction in the Commonwealth. Diamond City has actively contributed to more ghoul deaths than the Brotherhood when they expelled all ghouls from the City. It wasn't even done through subversive means, they democratically elected Mayor Mcdonough on the stance of ghoul expulsion.
Okay, correct me if Im wrong but wasnt McDonough already replaced by a synth by the time he became mayor? Given how the Institute no doubt hates ghouls, it makes sense that they would order their synth to demand ghouls to be removed. Hancock's whole story is about how his brother suddenly "changed", which he thought it was just to gain political power because ghouls are an easy target (and lets face it, this happens a lot in real life) but turns out its because he really was replaced by a synth so his real brother is dead.
Even the Railroad has a ghoul problem. Terminal entries from previous leader Pinky mentions that when Deacon made himself look like a ghoul it freaked people out and caused Pinky to kick him out of HQ.
Yeah, in retrospect, we arent very clear what the Railroad thinks of ghouls. They have no ghoul member which COULD be a concidence, they are small after all but there is never a moment where you can ask any of them their stance on ghouls.
It could be possible that people thought Deacon was a feral ghoul or some ghoul about to turn feral so thats why they reacted.
Anyway, that shows just how shallow the Railroad is as a faction, even the Minutemen at least made it clear from the get go that everyone is welcome.
They're extremely grimy and shit. If Bethesda wanted people to buy into paid mods they should have just picked up a couple teams in the community and paid them to make something significant and good.
The fact Bethesda hasnt gone to one of those teams making these remakes of the previous games and saying "We going to endorse you guys, give you plenty of money and resources to complete these faster and better, we will sell them reasonably cheap and we get 30% of the money" is kind of stupid and absurd.