That view is grounded on the fact that Toshimitsu foresaw that, should the plot be set into action, Mitsuhide AKECHI would earn his place as a disloyal and immoral vassal in history, and that even if Mitsuhide succeeded in eliminating Nobunaga ODA, other feudal lords would not approve of the methods he employed, and would not offer him their support.
理由は明智光秀が後世に不忠不義の臣として残ること、織田信長を討てても他の諸大名がその方法から支持しないことを見抜いていたためとされる。