The CIA spent the postwar years doing all kinds of gross things, one of which was trying to move as many nazis to Ukraine as possible, with the specific aim of creating a fascist uprising in the USSR and possibly a Ukrainian fascist break-away state. They accelerated this program after the USSR coup, and the result is a modern Ukrainian state with outright neo-nazis in positions of power over the police, cities, and entire government. This is also why Ukraine doesn't bother to do the hilariously simple trick of just telling their troops to stop wearing white nationalist, nazi patches, or perhaps suggesting to volunteers using assumed names to stop picking "Adolf" or "Dirlewanger" or whatever - they are all part of an explicitly fascist national project.