The statement that "Ms. DiMaggio took full ownership afterward and has since been saddled with a property that cannot be torn down or modified externally because it’s on the National Historic Register." is not true, at least not without more qualifying information.
The listing of a property in the National Register of Historic Places (the correct name) does not make a property completely un-changeable. Despite listing in the National Register, a property owner can do whatever they please with a property without review by the State or Federal government as long as they do not utilize state or federal permits or funding.
If the Town is imposing some sort of restriction because of the National Register listing, that's a Town issue, and should be noted as such. Bristol has a Historic District Commission - that body may be the one saying that the property cannot be demolished or modified externally, and while they may say that it is because the house is listed in the National Register, if they are reviewing the project it's because it is in a local historic district.
Please explain the inappropriate content below.