The claim of the FBI was that the blacks had been backed by communists...
True, the fear of Communism has run deep within the Republican Party since the 1930's at least, right up to the present.
..... but it's not totally unfounded as the old Black Power, new BLM movement is based on/influenced by the philosophy of Black Nationalism (American), Pan-Africanism (worldwide) and Socialism.
https://en.wikipedia.org/wiki/Black_nationalism
Black Nationalism: Black nationalism is a type of nationalism or pan-nationalism which espouses the belief that black people are a race and seeks to develop and maintain a black racial and national identity.[1] Black nationalist activism revolves around social, political, and economic empowerment of black communities and people, especially to resist assimilation into white culture (through integration or otherwise) and maintain a distinct black identity.[1]
Black nationalism arose within the African-American community in the United States. In the early 20th century, the Garveyism promoted by the U.S.-based Marcus Garvey furthered black nationalist ideas. Black nationalist ideas also proved an influence on the Black Islam movement, particularly groups like the Nation of Islam founded by Elijah Muhammad. During the 1960s, Black nationalism influenced the Black Panther Party and the broader Black Power movement.....
Pan-Africanism: Pan-Africanism is a worldwide movement that aims to encourage and strengthen bonds of solidarity between all indigenous and diaspora ethnic groups of African descent. Based on a common goal dating back to the Atlantic slave trade, the movement extends beyond continental Africans with a substantial support base among the African diaspora in the Americas and Europe.[1][2]
Pan-Africanism can be said to have its origins in the struggles of the African people against enslavement and colonization[3] and this struggle may be traced back to the first resistance on slave ships—rebellions and suicides—through the constant plantation and colonial uprisings and the "Back to Africa" movements of the 19th century. Based on the belief that unity is vital to economic, social and political progress and aims to "unify and uplift" people of African descent.[4]
At its core, pan-Africanism is a belief that "African people, both on the continent and in the diaspora, share not merely a common history, but a common destiny".[5] Pan-Africanist intellectual, cultural and political movements tend to view all Africans and descendants of Africans as belonging to a single "race" and sharing cultural unity. Pan-Africanism posits a sense of a shared historical fate for Africans in America, West Indies and on the continent itself centered on the Atlantic trade in slaves, African slavery and European imperialism.[6]
Socialism: Socialism is a political, social, and economic philosophy encompassing a range of economic and social systems characterised by social ownership[1][2][3] of the means of production[4][5][6][7] and workers' self-management of enterprises.[8][9] It includes the political theories and movements associated with such systems.[10] Social ownership can be public, collective, cooperative or of equity.[11] While no single definition encapsulates many types of socialism,[12] social ownership is the one common element.[1][13][14].......
Socialist politics has been both internationalist and nationalist in orientation; organised through political parties and opposed to party politics; at times overlapping with trade unions and at other times independent and critical of them; and present in both industrialised and developing nations.[32] Social democracy originated within the socialist movement,[33] supporting economic and social interventions to promote social justice.[34][35] While retaining socialism as a long-term goal.....
The socialist political movement includes a set of political philosophies that originated in the revolutionary movements of the mid-to-late 18th century and out of concern for the social problems that were associated with capitalism.[12]
....... to me this stuff is disturbingly familiar, smells just like the philosophy of White Supremacy only in reverse and can be used to justify the same abuses in the future.....