Mastodon is figuring out how to address Gab joining its platform
Source: How the biggest decentralized social network is dealing with its Nazi problem – The Verge
see
https://en.wikipedia.org/wiki/Paradox_of_tolerance
for managing in nazi groups, maybe
https://p2pblog.site/uncategorized/how-to-plant-a-meme-%c2%b7-do-not-research/