As many times as POTUS was mentioning 1917, perhaps he is going to put down Antifa's version of the Bolshevik Revolution.
Just sayin'.
https://www.historians.org/about-aha-and-membership/aha-history-and-archives/gi-roundtable-series/pamphlets/em-46-our-russian-ally-(1945)/what-was-the-bolshevik-revolution