They describe themselves as a continuation of the "Black liberation movement" (careful wording to not directly link themselves to the terrorist BLA, who were part of M19CO, but there's a striking resemblance in the demands of the BLA and the BLM).
There are plenty of other "offhand" comments these co-founders have made, declaring themselves to be "anti-capitalist", against the nuclear-family, "abolitionist" (referring to abolishing the police and the state).
Oh, and they keep the best company, as you do: https://twitter.com/abogadosvenezu1/status/12700347462618030...
No rational justification? Perhaps you can point me to something suggesting they're not a Marxist organization? Maybe they once made an off-hand comment in support of private property for example?
If it quacks like a duck...
I see this said so much and invariably there is no rational justification provided for these beliefs beyond "A founder made an offhand comment one time in an interview about their educational background"
Maybe I'll get a more thorough explanation on HN.
In what way does Black Lives Matter have an "insidious Marxism to it"? And what is your definition of Marxism?