The quote you cite is all that is asked of our educational system today.
Regardless of quotes and other athenications of the Southern views during the War Between the States; in my opinion it is most difficult to undo the mis-information spread throughout our "Government Owned and Controlled School System".
Political correctness is the rule today and no matter how much properly confirmed research that is presented to certain individuals and institutions they will never view the information as being correct because it does not support they preconcieved knowledge as is taught to them from so many texts today.
Members of SHAPE and other like organizations can do our best to present proper facts and those who have their "school" facts contridicted will not change their views. Some times I feel that we are really shoveling s--- against the tide when we attempt to present unbiased information.