Alright, I want you to tell me what YOUR plan to rebuild is......
Leave it up to the free market and private enterprise to get things done for now. With the Purifier active and working, the radiation will become less of a problem and the settlements are likely to grow. Bigger settlements means more trade which means more profit in getting to where you need to go without the Raiders getting in the way. This will create an incentive to start hunting down Raiders and before you know it, they'll become extinct.
Alright, tell me, who would rebuild America and how? The BOS? Fat chance... The slavers? Nope. The raiders? Hell no.
The American People will rebuild America. That is, the thousands of Wastelanders interested in surviving to live another day. They will group together in settlements and they will cooperate because it's in their best interest to do so. This will eventually lead to city states who will eventually come together in larger groupings, formerly also known as states. In fact, this is pretty much how it worked out for the old America as well.
You cannot expect to say "I am remaking America" and expect all the factions to agree, without somesort of hard work or hard dissisions. Its like saying "I want to make this house, but without lifting a finger." Really?
Difference is time scale. Apparently you want 2070 America rebuilt in a day. I'll be happy to have a high tech 1900 America (without the blatant racism, of course) rebuilt in a century, and I'd be overjoyed if the 2070 America that irradiated the entire planet is gone for good.
To remake America, you MUST use force to control the populace, or else nothing would happen.
And you call yourself American? You're no better than the Slavers and every time you call yourself a patriot, one of the founding fathers is rolling in his grave.
Your plan involves rebuilding America with everyone.. Really?
No, my plan involves the BoS doing what they love, killing super mutants and discovering new tech, while the "civilians" work on putting the tech to good use.
The slavers and Raiders would shoot your men with bullets before helping you rebuild America. The mutants would massacre you, the ghouls would assume your a bigot and shoot you.
The Slavers will soon cease to be a problem. Paradise Falls isn't that big and I'm sure I can talk the BoS and other potentially interested parties into a quick smash and dash, at which point a well motivated citizen's militia will be able to handle the rest. The Raiders will die out because profit dictates it. The super mutants are kept at bay and will slowly die out without more FEV, and with no Enclave around there's not going to be more FEV available. The ghouls will be reserved at first but they certainly aren't going to go to war for no reason (they'd gain nothing and potentially lose) and so eventually there'll be trade and tolerable relations. The feral ghouls and all the FEV critters in the Wasteland are a problem but one that can be managed through simple convoys.
The American people will get by just fine without being slaves of the Enclave, thank you very much.
Now, if the Enclave took them all out, then things would be MUCH easier.
The Enclave that considers normal humans with radiation damage mutants as well? The Enclave that has a track record of considering Wastelanders sub-human? Yeah, it would be MUCH easier if I could just be a slave for my Enclave overlords, wouldn't it? In your dreams, Enclaver.
And by the way, the challenge remains. Name one good thing the Enclave has done for humanity. I'm waiting.