The indictment accuses the two of leading a transnational group known as Terrorgram that espouses white supremacist ideology and violence to its followers
Man, they love this telegram hate. Don’t forget, they can also do this on ANY communication method. Killing telegram doesn't solve anything. Crime is a hydra.
Besides, they’ve likely already moved to a new service. Matrix, XMPP, Jami, Delta Chat, etc