A: Our Prophet Muhammad (peace be upon him) showed us the one way that Muslims must follow. It is Allah's straight Path and the sound methodology of His Din (religion). Allah (Exalted be He) states, "And verily, this (i.e. Allâh's Commandments mentioned in the above two Verses 151 and 152) is My Straight Path, so follow it, and follow not (other) paths, for they will separate you away from His Path. This He has ordained for you that you may become Al-Muttaqûn (the pious - see V.2:2)."
Our Lord of Glory and Majesty forbade the Ummah (community) of Muhammad (peace be upon him) from division and disputing, as this would lead to the enemy's success and domination. Allah (Glorified and Exalted be He) states, And hold fast, all of you together, to the Rope of Allâh (i.e. this Qur'ân), and be not divided among yourselves and:
He (Allâh) has ordained for you the same religion (Islâmic Monotheism) which He ordained for Nûh (Noah), and that which We have revealed to you (O Muhammad ﺻﻠﻰ ﺍﷲ ﻋﻠﻴﻪ ﻭ ﺳﻠﻢ), and that which We ordained for Ibrâhîm (Abraham), Mûsâ (Moses) and 'Isâ (Jesus) saying you should establish religion (i.e. to do what it orders you to do practically), and make no divisions in it (religion) (i.e. various sects in religion). Intolerable for the Mushrikûn, is that (Islamic Monotheism) to which you (O Muhammad ﺻﻠﻰ ﺍﷲ ﻋﻠﻴﻪ ﻭ ﺳﻠﻢ) call them.
Allah calls Muslims to unity and join hearts together. The increasing number of societies, which offer aid and cooperate in righteousness and piety in any Muslim country, is something good and beneficial for Muslims when their leaders have no ulterior motives. However, if these groups mislead and criticize each other, the situation will go from bad to worse and cause severe harm to Muslims. Muslim scholars, therefore, are obliged to explain the truth and speak with each group or organizations and advise them to follow the way shown by Allah and encouraged by our Prophet Muhammad (peace be upon him). Any group, which exceeds the proper limits or behaves stubbornly for personal gain known to none but Allah, must be defamed, so that everybody would be careful in dealing with it. Anyone who knows anything bad about a group should warn people against it, so that they will avoid involvement with it and escape the possibility of being misled and deterred from the Straight Path that Allah has ordained to be followed.