The SLA subjected Hearst to indoctrination in SLA ideology. Not to be overlooked is the link between propaganda, indoctrination, and terrorism/counterterrorism. AAI is opposed to indoctrination (and dogma), religious or otherwise. Schools were forced to serve as tools of communist indoctrination. Arendt distinguishes these two categories as "indoctrination" and "propaganda". Opponents of Communism claim that this is a form of indoctrination. Internalized racism has also been referred to as indoctrination and mental colonization. According to Bakunin, religion is sustained by indoctrination and conformism. There is also a case to be made toward religion/political indoctrination. Activities focused on political indoctrination rather than academic studies. In 1875, Grant proposed a constitutional amendment that limited religious indoctrination in public schools. The curriculum of indoctrination training lasted six weeks. Training must include marksmanship and political indoctrination. They offered education, which contained substantial amounts of political indoctrination. The samurai code "bushido" was pressed into service for indoctrination in militarism.