I notice lately more and more little children ( kindergarden and parly speaking ) who name call people around them

I was shocked one time that a kid , not older than 5 years old who called me many many names , some even a high school student wouldn’t use because i was fat

Not only that , but the boy was FAT , ROUND , and his mother was smiling , as if she is proud of him .

Why kids are learning to name call people ? don’t their families raise them on the fact that name calling isn’t Nice
not only that , but it is in the holy quarn

049.011 يَا أَيُّهَا الَّذِينَ آمَنُوا لا يَسْخَرْ قَومٌ مِنْ قَوْمٍ عَسَى أَنْ يَكُونُوا خَيْرًا مِنْهُمْ وَلا نِسَاءٌ مِنْ نِسَاءٍ عَسَى أَنْ يَكُنَّ خَيْرًا مِنْهُنَّ وَلا تَلْمِزُوا أَنْفُسَكُمْ وَلا تَنَابَزُوا بِالألْقَابِ بِئْسَ الاسْمُ الْفُسُوقُ بَعْدَ الإيمَانِ وَمَنْ لَمْ يَتُبْ فَأُولَئِكَ هُمُ الظَّالِمُونَ
049.011 O ye who believe! Let not some men among you laugh at others: It may be that the (latter) are better than the (former): Nor let some women laugh at others: It may be that the (latter are better than the (former): Nor defame nor be sarcastic to each other, nor call each other by (offensive) nicknames: Ill-seeming is a name connoting wickedness, (to be used of one) after he has believed: And those who do not desist are (indeed) doing wrong.

Al-Qur’an, 049.011 (Al-Hujraat [The Private Apartments, The Inner Apartments])

Watch your kids , or others will slap them for you

And if you are wondering what happened to the kid i mentioned above ?

Last thing he said was that i eat children , so i look at him and say ” oh yeah you look tasty and i’m hugry come here ”
and he went crying to his mom , who looked at me as if i did some mistake