Reasonable in what sense?

Eric Holder, appointee to be Attorney Heneral, told Congress the pardons of 16 members of the Puerto Rican terrorist group FALN, which he helped push through the Justice Department, were "reasonable." A victim says pardoning these terrorists was "a disrespectful affront to all Americans, particularly to those of us who have come face to face with their violence." Why is it reasonable to bestow pardons on anti-American terrorists?