Yes, you need to do the conspiracy, but, overt agreement is part of that. Just like a hitman simply saying "sure, I'll kill her" constitutes entering into the conspiracy, if, say, whatever initiation oath the Azov makes you recite says anything about working toward racial purity or anything like that, that would probably count. Or, if they at any point help in any way with any of the Azov's war efforts.

Remember that conspiracy law punishes all members of that conspiracy of every crime committed under it. If you and your friend rob a store, and your friend decides to shoot the cashier on their way out, even if they did not consult you, you're on the hook for murder. This video has two scenes with very Layman friendly explanations by a real lawyer of how that works in the US, and what constitutes a conspiracy in general