>>17938180 (OP)
Because northern italians are completely retarded and meek people, and preferred the "calm" and "soothing" south america, where they would get free land just because they are european (the iberians subhuman inhabiting those lands were pretty desperate for white people) instead of the urban hell of the obvious soon to be world hegemon.
Southern Italians are confident to a fault and embark in random things all the time just because they sound cool.
I think today italian americans are the richest italians on earth, richer than many other european diasporas, so in the end they won.