Complex sentence: Although there have been accusations that Disney was racist or anti-Semitic, they have been contradicted by many who knew him, even though one biographer thought Disney was likely "racially insensitive", like many of his generation.
Split into simpler sentences: Although there have been accusations that Disney was racist or anti-Semitic, they have been contradicted by many who knew him. One biographer, however, suggested that Disney was likely "racially insensitive", like many of his generation.