Lazar Kaganovich? In the 80s? What? Unless thirty years of Khrushchev-Brezhnev political culture have been undone, how in fuck would a Stalinist vanguard, bitter as he lives his last years, return to prominence? Even the possibility of rehabilitating his sole image was thrown out the window. Lazar had grown so disenchanted with post-Stalinist Sovietism it's unlikely he was even close to being in the right place at the right time for a political return, which is usually how non-persevering statesmen occasionally make it back to the arena. For a Stalinist to return, Stalinism itself must've returned beforehand.
Not that I give a shit about realism in modding, but Iron Curtain is generally tame when it comes to bending historical context. After all, unlike openly speculative mods such as Kaiserreich or TNO, CW:IC is, in principle, representing a genuine era with a few potential, more than actual, deviations. It's closer to vanilla HOI4 in this sense. Though, I suppose that, if HOI4 can have the Kaiser return, Cold War can have Kaganovich do it - why not.