The one who doesn’t recognise the authenticity of the hadith about the treatment with the urine of camels because urine and drinking it is against the natural predisposition (al fitra). Not only the hadith about urine of camels but also the one about obeying the muslim governement even if it beats his back and takes his wealth, these ahadeeths are against the natural predisposition and are insulting Islam.
Answer by Sheikh Fawzan :
This one is a moulhid (atheist), the one who says this is a moulhid and a zindiq (heretic). He (tries to) refute the Messenger of Allah (صلى الله عليه وعلى آله وسلم) and his speech is not accepted. It is mandatory to treat him as an apostate of the religion of Islam.
عَنْ أَنَسٍ ـ رضى الله عنه ـ أَنَّ نَاسًا، اجْتَوَوْا فِي الْمَدِينَةِ فَأَمَرَهُمُ النَّبِيُّ صلى الله عليه وسلم أَنْ يَلْحَقُوا بِرَاعِيهِ ـ يَعْنِي الإِبِلَ ـ فَيَشْرَبُوا مِنْ أَلْبَانِهَا وَأَبْوَالِهَا، فَلَحِقُوا بِرَاعِيهِ فَشَرِبُوا مِنْ أَلْبَانِهَا وَأَبْوَالِهَا، حَتَّى صَلَحَتْ أَبْدَانُهُمْ فَقَتَلُوا الرَّاعِيَ وَسَاقُوا الإِبِلَ، فَبَلَغَ النَّبِيَّ صلى الله عليه وسلم فَبَعَثَ فِي طَلَبِهِمْ، فَجِيءَ بِهِمْ فَقَطَعَ أَيْدِيَهُمْ وَأَرْجُلَهُمْ، وَسَمَرَ أَعْيُنَهُمْ. قَالَ قَتَادَةُ فَحَدَّثَنِي مُحَمَّدُ بْنُ سِيرِينَ أَنَّ ذَلِكَ كَانَ قَبْلَ أَنْ تَنْزِلَ الْحُدُودُ.
The climate of Medina did not suit some people, so the Prophet (صلى الله عليه وعلى آله وسلم) ordered them to follow his shepherd, i.e. his camels, and drink their milk and urine (as a medicine). So they followed the shepherd that is the camels and drank their milk and urine till their bodies became healthy. Then they killed the shepherd and drove away the camels. When the news reached the Prophet (صلى الله عليه وعلى آله وسلم) he sent some people in their pursuit. When they were brought, he cut their hands and feet and their eyes were branded with heated pieces of iron.