Original sentence: Japanologist Alex Kerr has criticized Arudou for his "openly combative attitude", an approach that Kerr says usually "fails" in Japan and may reinforce the conservative belief "that gaijin are difficult to deal with"
Edited sentence: Japanologist Alex Kerr has criticized Arudou for his "openly combative attitude", an approach that Kerr thinks usually "fails" in Japan and may reinforce the conservative belief "that gaijin are difficult to deal with"