One read “Hello darling? Turn up the oven, I am coming home!”, while the other said “Let's go... Today, we’ll have an all-gas [full-throttle] evening!!!”
The Simon Wiesenthal Center has called for the National Association of Italian Partisans (ANPI), founded by participants of the Italian Resistance, to investigate the incident, which was apparently intended as a “prank”.
The schoolboy's classmates reportedly refused to eat the cake, which was unveiled at his birthday party, later reporting the matter to a teacher.
Dr Shimon Samuels, of the Simon Wiesenthal Center, said: “We turn to ANPI to investigate and seek appropriate measures against the parents and the pastry cook, who indeed offended the anti-Nazi resistance and the victims of the Holocaust.
“ANPI is well-placed to engage in an educational initiative for schools, to sensitize parents through their children to the dangers of Holocaust abuse.
“The Simon Wiesenthal Center - Europe stands ready to assist in this campaign.”