Raise the issue as a complaint about a behavior, not an attack on their character. Skip you always and you never.

الحجرات

يَٰٓأَيُّهَا ٱلَّذِينَ ءَامَنُواْ لَا يَسۡخَرۡ قَوۡمࣱ مِّن قَوۡمٍ عَسَىٰٓ أَن يَكُونُواْ خَيۡرࣰ ا مِّنۡهُمۡ وَلَا نِسَآءࣱ مِّن نِّسَآءٍ عَسَىٰٓ أَن يَكُنَّ خَيۡرࣰ ا مِّنۡهُنَّۖ وَلَا تَلۡمِزُوٓاْ أَنفُسَكُمۡ وَلَا تَنَابَزُواْ بِٱلۡأَلۡقَٰبِۖ بِئۡسَ ٱلِٱسۡمُ ٱلۡفُسُوقُ بَعۡدَ ٱلۡإِيمَٰنِۚ وَمَن لَّمۡ يَتُبۡ فَأُوْلَٰٓئِكَ هُمُ ٱلظَّٰلِمُونَ

Believers, no one group of men should jeer at another, who may after all be better than them; no one group of women should jeer at another, who may after all be better than them; do not speak ill of one another; do not use offensive nicknames for one another. How bad it is to be called a mischief-maker after accepting faith! Those who do not repent of this behaviour are evildoers

Qur’an 49:11read it in the library