Sentence:  Some believe it is an expression of Hebrew-Americanism, others think it is an expressiosic <!-- an error in the reprint? -->of Negro-Americanism, still other'ssic<!-- ditto --> think it is pure American, <WSD>unhyphenated</WSD>. 
Meaning of the word marked with <WSD> tags:  Of people, belonging to a single ethnicity or nationality: names for multi-ethnic/multi-nationality groups generally require a hyphen to connect the names being combined.