The Hardline Movement, according to Aaron at Internet Haganah, who kindly pointed this out to me (thank you very much, Aaron), seems to be aiming to “recruit for jihad ‘revolutionaries’ of all types, who, over time, can be brought into the fold of Islam, inshallah. In other words, all you have to do is share the desire to bring down ‘Amerika.'”
For background on the Hardline Movement, “see the related taliyah.org site. . . . Note also the focus at taliyah.org on jailhouse jihad. See for example: Islamic Revolution in Amerikkka,” written by Mustafa (Al-Khemi) Lancaster, a prisoner in San Quentin.