المراد بالمؤمن الشيعة الإمامية الاثني عشرية . وأما الأخبار فما اشتملت على المؤمن فكذلك ، وما اشتملت على الأخ لا تشملهم أيضا لعدم الأخوة بيننا وبينهم بعد وجوب البراءة عنهم وعن مذهبهم وعن أئمتهم ، كما تدل عليه الأخبار واقتضته أصول المذهب...وقال: فإنها في مقام تفسيرها اعتبرت الأخوة فيها ، فغيرنا ليسوا بإخواننا
What is meant by the term 'momin', is Shia Ithna Ash'ari only. As for the ahadith which are applicable on the 'momin', so they are meant to be for the Imami shias only. Therefore, the ahadith which mention 'your brother' (for example ahadith on backbiting being akin to eating the meat of one's brother) do not include the non shias (sunnis etc) for there is no brotherhood at all between us Imami shias and the non Shias. In fact, it is absolutely obligatory to do tabarra from them, their schools of thought and their leading scholars, based upon our ahadith which deem it (absolute tabarra from non shias) to be the core of our religion. So whenever brotherhood is implied in religious interpretations, it must be kept in mind that non shias our by no means our brothers.