What excuse does the present day OTL PRC have to "keep their system around"? Why hasn't the end of their Common Enemy the New Russian Empire aka Warsaw Pact lead a massive split between the West and the PRC?
The answer: It's a ginormous market. Now Italy alone wont be as big a market as the present day PRC, but the entire RA is another kettle of fish.
IMHO if the Fascist regimes fall, it'll be to economic mismanagement resulting in ever greater living standard disparities between themselves and the Democracies, that the increased interconnectedness of the world will make impossibly to hide. Which means they'll fall sooner or later regardless of how strong or not the Democracies oppose them. However if they are doing more or less ok economically, then the Democracies wont turn against them to begin with. If OTL events of the last few weeks are any indication, then even the wokiest of organisations wont take a stand against the RA as long as lots of money is involved.