Kean, 19, scored his sixth goal in as many games for club and country during their 2-0 league win on Tuesday evening as he seemingly has taken over the goal-scoring burden of injured Cristiano Ronaldo.
READ: 'UEFA and FIFA not doing enough to fight racism'
While the meteoric rise of the teenager has been lauded in Italy over the past month, he was subject to racial slurs from the home supporters at the Sardegna Arena - which prompted him to celebrate in front of their ultras after scoring.
Teammate Blaise Matuidi appeared to have signalled to manager Massimo Allegri to initiate a walk-off amidst the chants but play continued after a brief stadium announcement - which was met with further jeers.
After being dragged away by his teammates within the rising tension, Bonucci surprisingly insinuated Kean should have known better.
''Kean knows himself too that he could have done something else,'' Bonucci said, as per Football Italia.
''There were racist boos after Kean's celebration and [Blaise] Matuidi got angry but I think the blame is 50 and 50. Kean made a mistake and the fans made a mistake.
''Saying that we know that we have to be an example and we'll look forwards because we all have to grow, us players too, also in these things.''
Funny how these fans who hurl racial insults at him will chant his name when he’s scoring for the national team. pic.twitter.com/5A3RUDRH5E— Lorenz Köhler (@Lorenz07Kohler) April 3, 2019