Bit long, but I'll try.
1/ In which case, it's an over-simplification to say that "History is written by the victors"
The History is always written by the victors. Sometimes it takes a long time to challenge, and change, the "official" version.
We had 40 years of "official" version of History as seen by a dictator. Don't tell me.
1/ Every schoolboy or schoolgirl who studies the subject in an English school will encounter your "corrected" version; there is nothing daring or challenging about it.
Yes, now. But if I remember rightly, Richard III died around 1480 or so (sorry, I have no time to google anything). It was not until the XVIII century that his name was cleared. So the official version took quite a long time to be challenged.
3/ That's a much more reasonable statement than your earlier remark that if Germany had won the Second World War, "each and every one of us" here would think you were "vermin".
Yep, that was an exaggeration OK. Of course not every person in the whole wide world have one same thought. But antisemitism, (and racism) exist, you know.
4/ The contradiction lies in maintaining on the one hand that Caesar, as "victor", decided the facts of history with his DBG, while implying on the other hand that you have access to some alternative version of events.
Same answer as in 1.
5/ The passage you quote occurs in Suetonius's discussion of Caesar's "clemency", of which he has just enumerated examples.
The passage states Julius Caesar's ambition. Written many years after his death. I've no time to check Cato now, but he stated much the same. he said something similar to "Caesar was the only one who tried to revolt against the Republic who was not a drunk".
6/ I'm not aware that we've discussed Richard III before.
I was not aware we were discussing some Polish soldiers in WWII until you mentioned them.
7/ So I'm not quite sure how your comments about him represent a "challenge" to my view of him. And as I've already said, your "corrected" view of Richard III is itself quite conventional.
The challenge lies in a Spaniard discussing English History with a Brit
. As far as I understand, Alexa was not challenging you personally, but rather saying that events X in History were not put into question during a long time. I don't think, either, that the "corrected" version of Richard III is "hers", conventional or not.