sentences:  In the wake of this incident, similar disruptions by Chinese students who disagreed with his death toll estimate prevented Hata from speaking at a number of universities that he visited.Bob Wakabayashi of York University argues that Hata became more strident in his tone following these attacks, once calling it the "Nanking industry" in comparison with Norman Finkelstein's "Holocaust industry".In the 1980s Hata had stated that the death toll was 38,000 to 42,000 while holding out the possibility that it might have been as high as 60,000, but when he wrote the second edition of "Nankin Jiken" in 2007 he indicated that 42,000 massacred was the maximum possible and that the true number might have been lower.