Fascist being collectivist is outside my typical understanding of the term. The fact that they used it in that way is wild. I mostly heard this term in my phycology class where they referred to the west as more individualist and Asia (including non-socialist countries) more as being collectivist. The implication was that in the west individuals are more likely to put themselves(and sometimes their immediate family) before society, but in the collectivist mindset, the individual was more likely to put themselves after society. This typically applied to duties, behaviour, and sacrifice when it was discussed in the class.

This is something that I need to interrogate since I haven’t really thought about it for several years since I was a lib in university. My initial thought now is that socialist society engenders solidarity with your fellow workers, allowing you to see the benefit in helping other people. Honestly though, I shouldn’t speculate too much without further investigation.