WELL ACCORDING TO THE ADVICE OF BOOK OF ALLAH:-
"And hold fast altogether to the rope of Allaah and do not become divided." [Soorah Aali-‘Imraan 3:102]
"And do not be like those who differed and split-up after the clear evidences came to them." [Soorah Aali-‘Imraan 3:105].
"And help you one another in righteousness and piety, but do not help one another in sin and transgression." [Sooratul Maa`idah 5:2]
"The Believers – men and women – are protectors to each other, they order the good and forbid the evil…" [Sooratut-Tawbah 9:71]
"Invite to the way of your Lord with wisdom and beautiful admonition, and argue with them in ways that are better." [Sooratun-Nahl 16:125]
And he (sallallaahu ‘alayhi wa sallam) said:
"Whosoever sees an evil, then let him change it with his hand. If he is unable to do this, then with his tongue, and if he is unable to do this, then with his heart. And that is the weakest of eemaan (faith)." [4]
And he (sallallaahu ‘alayhi wa sallam) said:
"Whosoever directs a person to do good, will have a reward similar to the one who does that good." [5]
And the aayaat and ahaadeeth with this meaning are plenty." [6]