Yes, locals were very much against Disney's America and felt that park would ruin the "historic" character of the Bull Run battlefield and the town of Manassas. Of course, now the area is covered with housing developments, suburban strip malls, and Cracker Barrel restaurants. Oh, well . . .
To be fair given the spectacular mess that was Disney's internal management in the mid- to late 90s (that led to the infamous Eisner micromanagement at the turn of the millennium) it's entirely possible that DA would have been cancelled even without the local opposition. Both WestCot and Port Disney were canned around the same time.
I agree that even with local support, the Disney's America park wouldn't have been built.