Depend... I was told that the official Rissiogiormanto vision of a people 'crying' for unity was not quite so true, and that in the south, there was a localism feeling, the southern italians while knowing they are italians yes, knew - and quite well - that they where different from the north.
Localism or regional identity doesn't mean nationalism : we have enough proof of that in basically all the old nation-states.
There's enough facts (I'm not talking about analysis there, but facts)
Risorgimento was a thing as well in southern Italy among population : the insurrections of 1848 in the kingdom (Palermo, Messine that revolted again in 1860)
As for elites, I could mention Guglielmo Pepe, as well the court of Naples in large parts in the late 50's.
The whole "evil official history" is a cliché of right-wing revisionists, a bit like its french counter part ("Revolutions were always a thing in Paris, never in France"), but it's an eminently ideological stuff.
There is a (small) minority of bourbon monarchists nowaday... nothing much, but it's one of many things (like the still there contrasts in the economy north vs south) who tell me that the south was at least 'neglegated' in the whole deal.
I'm not sure that retroactively justify a non-italian feeling before the union, because of the consequences of the union is going to work. Especially when it concerns a minority of loonies so tiny that it barely avoided to be considered as some form of bacteria.