No, his whole point was not that.
>We do not pretend to know where the truth lies amidst these sharply conflicting assessments; rather, we again want to emphasize some crucial points
This is genocide denial.
Would you consider someone claiming not to know if the Holocaust really happened and pleading people to emphasize the crucial point of allied propaganda effects to be doing what, exactly?
Chomsky has a long list of offenses, this is just one and you're misrepresenting how egregious it is to claim we can't really know if 1.7 to 2 million people were executed.