I am, for lack of a better term, a synth-sympathiser. I'm on my second playthrough and have not yet found what I would consider to be a pre-established synth-safe city. Ticon is about as close as I can get, but it has a few problems: A) it's a pass-through, not a home, it's sparsely populated, C) it's not well defended and D) as far as I know, I can't turn it into a settlement, thereby boosting its defenses.
While I applaud the Railroad for their efforts, I wish they'd work on integrating synths into the general population, rather than simply hiding them and shuttling them out of the Commonwealth. Maybe that's in their long-term plans, I don't know. Plus, some of their methods are a bit... well, let's just say I'm not 100% on-board.
I was hoping The Slog would be welcoming, given their personal experiences with prejudice, but they seem to be as prejudiced against synths as non-ghoul humans are. Disappointing. At the very least, I'd welcome a quest where I could attempt to open/change their minds.
Anyway, I would love to find a pre-established synth-safe settlement. Or, if I had to, I wouldn't be opposed to creating one. A settlement that welcomes EVERYONE: synth, human, ghoul, whatever, just so long as you're a nice person. I'd like to see us all get along. Harmony Haven, I'd call it. Does any such place exist? Have I missed it in my travels?