tldr: Jacob Schiff was a super wealthy Jewish banker. Because of the state endorsed pogroms in Russia he refused to lend to the Russian Empire and instead lent to Japan - helping them to buy weapons and win the Russian-Japanese war.
After the fall of the empire he no longer blacklisted Russia.
The simplification of a complex political and social event like the Russian Revolution to the 'Bankrolling of Jews' is not only stupid and narrow minded but is part of a long and sordid history. https://en.wikipedia.org/wiki/Jewish_Bolshevism
On a sort of related matter if anyone would like to read a very entertaining novel about conspiracy theories, check out Umberto Eco's 'Prague Cemetery'.
Would you say it has any parallels with Foucault's Pendulum?
Prague Cemetery ruminates on the ideas of slanderous conspiracies [slanderous isn't really a strong enough word, they are really hateful]. At the start of the book Royalists are spreading conspiracies about the Jesuits being behind Italian Republicanism.
By the end of the book the Jesuits have either been replaced by the Jews, or are working hand in hand with them. As in Focault's Pendulum many of the people manufacturing the conspiracy are also believers in it. In the Name of the Rose there are long passages about the nature of heresy and how a power [the Church] declaring something to be a heretical belief can attract those who oppose that power, in effect spreading that heresy, even in cases where the heretical belief might be manufactured or non-existent.
One major difference is that the book also sets out how these conspiracies serve people's interests. In some cases the interests served are political reactionaries, in other it is political regimes or state intelligence agencies.
It feels like a longer novel that Focault's Pendulum, though I'm not sure if that's correct. I think it loses the run of itself a little in places but it is well worth a read.
a little "funding" has an impact that works out to be a wash, considering that most of the combatants in the war had obsolete weapons, no organization, no food, no logistic chain, no cold weather gear, no education, etc...
Given this I don't think it makes sense to say that the Russian Revolution was funded by "Wall St." but rather that it was supported by a wealthy Jewish American who opposed the Tzarist regime.