sympathizer
noun [ C ] (UK usually sympathiser) uk/ˈsɪm.pə.θaɪ.zər/ us/ˈsɪm.pə.θaɪ.zɚ/
支持者；信奉者
a person who supports a political organization or believes in a set of ideas
He had been a known IRA sympathizer. 众所周知，他支持爱尔兰共和军。
Synonym: supporter
Compare: well-wisher