One question is whether Fascism has been tried for real.
Another question is whether Fascism is really all that bad, if you take away the Hitlerite perversions. Anti-semitism and lebensraum weren't significant policies of the Italian and Spanish regimes. Hell, even the Hitlerite doctrine of fomenting unrest as a way to annex neighboring territories had more in common with the communists than with his fellow fascists.
I'd say that's somewhat incorrect on two counts:
1. Actually the Italian version had been tried for like a decade more than Adolf's. A little more than two decades total. If that's not enough for you to get at least a feel for it, I'm not sure how much more is needed.
It was fairly popular too, both abroad and domestically. Domestically because it managed to end a VERY turbulent period that Italy found itself in after WW1, mostly. (Somewhat similar to the troubles the Weimar Republic had, really, although not identical.)
2. Actually revanchism and delusions of grandeur were a pretty core thing for all of them.
E.g., while Italy didn't phrase it as lebensraum and whatnot, Il Duce hammered pretty much non-stop on his delusions of re-creating the Roman Empire. It's also the guys who did a brutal attack on Ethiopia, invaded Albania which was very much an ally of Italy, invaded Greece (even if Germany had to finish that), sent its army into Yugoslavia, and so on. Plus joined very willingly in attacking France (if again, rather incompetently), the UK in Africa, and later joined Germany against the USSR. And had been rattling its sabre and itching to have a go at Austria, before Adolf took THAT prize.
I guess people don't really remember Italy as a conqueror in WW2 because they were really really bad at it, but it doesn't mean they didn't try. More importantly, it doesn't mean it wasn't a core component of their ideology.
And Spain, really, is inconclusive since it was basically licking its wounds after the civil war for a long time. Which may well be the main reason why it didn't join the Axis.
I'd also add that all flavours were equally adept at stalling their own economy in the name of that revanchism. Again, you may not remember Italy for its legions of panzers, but that's only because its industrial power was best described with two words: "bugger" and "all". Actually the drain they put on their own economy in the name of that revanchism may well be greater than even what Germany did.
Again, lack of success doesn't equal lack of trying.
Also all flavours were actually very busy repressing their own population, and occupied populations. Just because Il Duce didn't have a raging boner about killing specifically Jews, doesn't really make him a good guy.