The USSR didn't supply the anarchists. ~~They~~ The Communists actively refused to give them arms and worked against them. That was the cause of Orwell's disdain towards them. source: https://theanarchistlibrary.org/library/noam-chomsky-on-anarchism#fn70
Edit: Correcting sentencing after being corrected in a reply.
I think that there are two separate readings of the tricornkings statement.
I imagine that the second statement was the original intention of the author as I do not think Darwin had access to Internet memes as means of spreading his theory.
This might seem obvious to some but it would be appreciated if people kept in mind how the language they use could be misinterpreted, especially in text.