Sentence:  And if a nation has not felt aroused by the <WSD>bestialities</WSD> of whites, it has no right to expect anything different from the Negroes who have been on the receiving end of these <WSD>bestialities</WSD> for over 300 years. 
Meaning of the word marked with <WSD> tags:  Bestial nature, savagery, inhumanity, like (or akin to) an animal's.