It's a social engineering psyop in my humble opinion. Rewriting history in real time and all that.
But it wasn't a rewriting of history unless people managed to avoid news about mandela for over 20 years. It's ,ay be a psyop, but it's perpetuated by very low information NPCs who somehow escaped being informed for two decades yet feel like they know what was going on. There's no excuse for that part.
The world is full of 85 iqs that never read more than a headline and think themselves informed.