Sentence:  “Why, them dirty <WSD>commies</WSD>, of course. They′re the ones startin′ all this fuss anyway. Them cotton-pickin′ niggers wasn′t causin′ no trouble until them Yankee <WSD>commies</WSD> started in.” 
Meaning of the word marked with <WSD> tags:  A communist; a person with communist sympathies; a supposed communist infiltrator.