MI6 funded, supplied, and trained the Hungarian counter-revolutionaries.
This claim is made by the author of “New Cloak, Old Dagger” book, however despite seeing some references to some old 90s articles (which I can’t see, only if you are subscribed), these funding claims are apparently coming from a supposed MI6 contact, but this hasn’t been verified so there is some suspicion, especially because he mentions a “Red Sox” operation vaguely related to covert operations generally in the 50s but I have only seen like 2 articles that mentions this, and those are talking about 1930s ukrainian covert ops, also no old article references have “Red Sox” in it’s titles.
But let’s assume that all of his claims are true, since both the soviets and the west spied on eachother a lot. So even if MI6 trained some hungarian it had a mere effect compared to the huge grass-roots uprising in various cities by the commoners.
The Hungarian revolt in 1956 was infested with anti-semitic pograms
These counter-revolutionaries were allied with fascists who were lynching Jewish people and Communists
A different source that explains the amount of antisemitism was negligible from Reddit with sources:
“Anti-semitism was marginal. Fromsources I checked, anti-semitic acts and various messages did happen and come up (mainly in the countryside), they were more sideline occurences that did not come to shape the overall tone of events.”
This claim is made by the author of “New Cloak, Old Dagger” book, however despite seeing some references to some old 90s articles (which I can’t see, only if you are subscribed), these funding claims are apparently coming from a supposed MI6 contact, but this hasn’t been verified so there is some suspicion, especially because he mentions a “Red Sox” operation vaguely related to covert operations generally in the 50s but I have only seen like 2 articles that mentions this, and those are talking about 1930s ukrainian covert ops, also no old article references have “Red Sox” in it’s titles.
But let’s assume that all of his claims are true, since both the soviets and the west spied on eachother a lot. So even if MI6 trained some hungarian it had a mere effect compared to the huge grass-roots uprising in various cities by the commoners.
The “fascist elements” author was expelled for a time by the CIA in suspicion of being biased towards the communists.

Another CIA document which doesn’t believe there was a rise of fascism.
A different source that explains the amount of antisemitism was negligible from Reddit with sources:
“Anti-semitism was marginal. From sources I checked, anti-semitic acts and various messages did happen and come up (mainly in the countryside), they were more sideline occurences that did not come to shape the overall tone of events.”
Just by seeing how many antisemite people every country has even now, it is reasonable to assume that these incidents weren’t way above than the average. However Stalin and Brezhnev used antisemitism extensively under their rule
On the other hand, killing communists by the revolutionaries was definitely a more common thing. Imagine as a young student seeing the Communist Party win with a huge blue ballot election fraud, implementing brutal planned economy tactics which lead to country-wide famine (my grandma as a child seen newspaper as a rich person’s item, life was so brutal), your people being deported to Gulag just because they dared to even question the dictatorship in any way, instilling fear by the ÁVH, political members being executed on false charges, etc. and not having the urges to kill hardliner stalinists with a lead pipe. Ofc killing people are awful, but brutal times can bring out the extremes of some people.
That CIA document happened way after 1956, and the CIA was caught in a surprise after the revolution have began. They were only doing small intelligence gathering before that.
Also if the CIA would have funded this uprising then the revolter party wouldn’t have been a socialist lead party by Imre Nagy.