This should be the case even if he is a family member. We are not benefited by trying to refute the arguments of apostates or those who are critical of Jehovah’s organization.
(‏ تث ١٣ :‏ ​ ٦ -‏ ٩‏ )‏ فَلْنَتَجَنَّبْ كُلَّ مَا يَمُتُّ بِصِلَةٍ إِلَيْهِمْ أَوْ إِلَى أَيِّ مَنْ يَدَّعِي أَنَّهُ أَخٌ وَهُوَ يُحَقِّرُ ٱللهَ ،‏ حَتَّى لَوْ كَانَ أَحَدَ أَفْرَادِ عَائِلَتِنَا .‏