You can't be a good organizer without empathy, and you can't be an effective communist without being a good organizer. I get needing to denounce the liberal line that being nice to everyone will fix society, but rejecting empathy and compassion is right deviation. https://twitter.com/EternalDago/status/1199813942236856320
Sometimes working and oppressed people need a lot more from you or your org than you expected, and that can be stressful, but if you're committed you follow through anyway. It takes empathy to have that kind of commitment. A lack of empathy leads to apathy and opportunism.
Liberal: empathy is necessary and sufficient to change the world
Right deviationist/economist: empathy is not necessary or sufficient to change the world
Communist: empathy is necessary but not sufficient to change the world
Right deviationist/economist: empathy is not necessary or sufficient to change the world
Communist: empathy is necessary but not sufficient to change the world