The problem I've seen repeated over and over again is that there is a total lack of historical and political understanding of the far left.
In this country we are taught about the dangers of Nazis repeatedly and well.
But we are taught little about the abuse and dangerous of Communism and the far left. Instead it can almost be glorified. Norovirsus media and its cheer leaders present Communism as something completely different to what it is too, which doesn't help.
Young people in the UK do not under who Stalin was, who the Stasi were, who the KGB were, don't draw parallels or questions over the Chinese or Vietnamese governments, don't under who the Khmer Rogue were etc etc.
The only time, I've REALLY learnt about it has been from spending time in Eastern Europe particularly in Lativa, Hungary and the former Yugoslav Republics. This is despite extended family members being directly affected by the division of Germany and the Berlin Wall (my grandfather remarried a german woman) and seeing the Iron Curtain before it fell.
We happened to be in Riga on 20 Jan a few years back and they had memorial services and candles in the part which we didn't understand. We looked it up...
https://en.wikipedia.org/wiki/The_Barricades
It was about resistence to Soviet oppression trying to prevent Independence. In 1991. This isn't ancient history. Yet I didn't really know about it (I was 12 at the time of The Barricades).
In Hungary we visited The House of Terror in Budapest which is a museum dedicated to the Stasi https://terrorhaza.hu/en
Honestly, we should be aware that this is a problem within history teaching in the UK. Its a massive gap in understanding the world and has much more relevance and importance to us than knowing about zillions of Kings and Queens.