Alexander-Arnold suggested that winning titles with Liverpol was more meaningful than the trophies Manchester City were winning, as the latter have more money.
Speaking to OCB Scores, World Cup winner Petit stated: "What Trent Alexander-Arnold said about trophies being more important to Liverpool players and fans is bull****. That's bull****.
"Is he trying to say that Liverpool fans are better and more passionate than other fans?
"Does he think they deserve to win more trophies than other clubs for their fans? That's ridiculous. When I read that comment I thought to myself: 'Sometimes it's better to shut your mouth'.
"Pep Guardiola and Manchester City have been the reference point in Europe for years and Liverpool have done so well also, I will miss Jurgen Klopp.
But in terms of Trent, sometimes when you have something to say just think about it twice before you open your mouth."