Sentence:  Some individuals called opportunists wanted Indians removed from their lands for availability, and they did not care about the Indian Problem. These views put many Christians and humanitarians on one side and <WSD>removalists</WSD> on the other. Among the <WSD>removalists</WSD> were opportunists who took advantage of the displacement of Native groups to reservations. 
Meaning of the word marked with <WSD> tags:  One who advocates the removal of native populations from their land.