It's the textbook definition of sheepish mentality. Let's make a huge welcome in a square for a dude who didn't play one minute in our shirt. Btw, that's one of the main reasons why southern italian clubs are always lagging behind the north, besides the economic reasons of course. They make you a star even if you didn't win one trophy or even played one game in their shirt, and look no further for napoli and roma as prime examples of that shit.
You have warm welcoming for new players in turin and milan as well, but it's never thousands of people like it was in rome. They v made celebrations like they won a trophy ffs
Those types of celebrations are for trophies and legends like zanetti, maldini, del piero, totti, not for the newcomers.
And this shit is not trivial as it may sound, it breeds loser mentality and lo and behold I can't think of any bigger loser teams in seria a than roma and napoli, exactly the two teams whose fans you are expecting to make these pathetic welcomings without a hint of merit.