I believe that you are generally correct.  The attitude can be traced back to
the "Black Legend" of Spain from Elizabethan times and is unconsciously
perpetuated today outside the Spanish borderlands, where Spain is assumed to
have had no impact.  Everyone knows that the Chesapeake is a focus of English
colonization, so forget about the earlier Jesuit mission.  The same might be
said of Labrador and the Basques.  Too bad, as it might help to explain later
NA attitudes towards colonists.
Bob Hoover