This is a well-researched two-part article on the history of Antifa and who pulls its strings. The section at the end of this article, “Antifa In Its Own Words,” is particularly instructive. From Soeren Kern at gatestoneinstitute.org:

• “The only long-term solution to the fascist menace is to undermine its pillars of strength in society grounded not only in white supremacy but also in ableism, heteronormativity, patriarchy, nationalism, transphobia, class rule, and many others.” — Mark Bray, “Antifa: The Anti-Fascist Handbook,” 2017.
• “They’re coming from other cities. That cost money. They didn’t do this on their own. Somebody’s paying for this…. What Antifa is doing is they’re basically hijacking the black community as their army. They instigate, they antagonize, they get these young black men and women to go out there and do stupid things, and then they disappear off into the sunset.” — Bernard Kerik, former commissioner…