The book club is one of the best ways to start a political party! Lenin and the Bolsheviks started off as a reading circle. Prolewiki hosts a guide to organizing, and one of the primary texts goes over how to start a study circle and why this is a great pre-party formation.

This isn't to say I think it's a good thing that these groups are being targeted. It's the opposite. My point is that the establishment understands that knowledge and organizing are dangerous to their power.