trot groups in england were very heavily infiltrated by cops for decades as were others in the west. Search "swp" in the Undercover Policing Inquiry published evidence

there was a zine I read years and years ago that explained how (and maybe why) trots love making front groups to ruin every little progressive project. It was before all this infiltration stuff came out but when it did, everything made sense. The title was "monopolize resistance" I can't find it online.