I'll simply say that if Lind proves that the decision to go to war was understandable, Logevall provides the argument for the minimal realist view that it was unnecessary and unwise.
Logevall believes the war was unnecessary and unwise. 
mnli hypothesis: Logevall believes the war was unnecessary and unwise.  premise: I'll simply say that if Lind proves that the decision to go to war was understandable, Logevall provides the argument for the minimal realist view that it was unnecessary and unwise.