

The issue is that by attacking people you are puahing them farther into extremism.
Isolation from friends, family and other social support networks further intensifies social influence within cults. By severing ties with external influences, cults control members’ social interactions and shape their perceptions of reality. This isolation heightens members’ dependence on the cult for social connection and validation, making it difficult for them to seek help or escape from the group’s control.
It depends on how you approach it, you shouldn’t be friends with someone like that, but they need to undertand why.