Complex sentence: Critics and people within the poetry community were sharply critical of Hudson's use of a pseudonym; characterizing it as racist, an act of "yellowface" (like donning "blackface" in minstrel shows), or describing it as "literary fraud".
Split into simpler sentences: Critics and people within the poetry community were critical of Hudson's use of a pseudonym. Some called it racist, an act of "yellowface," or describing it as "literary fraud".