First of all we can say that sectarianism among Muslims is one of the sings we should bear in mind, as in the Qur'an it is mentioned that all previous peoples denied the Revelations and Guidance and as a consequence fall for sectarianism:
41:53 In time We will show them Our signs in the utmost Horizons and within themselves, so that it will become clear to them that this Qur’an is certainly the truth. Is it not enough for them to know that your Lord is Witness to all things (including this proclamation)?
[9:31-33, 13:31, 14:48, 18:48, 41:53, 48:28, 51:20-21, 61:9]
25:30 And the messenger will say, “O My Lord! These are my people, the ones who had disabled this Qur’an making it of no account."
Any person with the knowledge of the Qur'an would realize that all problems and cruelties in the world are due to abandoning the Knowledge of Revelation and pursuing man-made systems and philosophies.
All prophets and their Followers were compassionate towards their people, they didn't want Heaven only for themselves. They tried to help people, all sacrificed themselves in order to reform and make things better, that is the reason why they were successful.
6:42 We sent messengers to nations before you. (They compassionately advised their people that the Supreme law is operative on the earth, as it is in the Universe that is in the heavens and all that is on earth.) When those nations violated Our laws in their societies, they had to face the consequences. They should have become humble and taken corrective action right away.
But, we all are bestowed FREE WILL, DIVINE ENERGY, so we don't have to convince people but we have to convey the truth:
16:93 Had God so willed, He could have made you all one single community. However, He lets go astray him that wills (to go astray) and guides him that wills (to be guided). And you will be surely called to account for all that you ever did.
27:92 And to convey this Qur’an (to mankind). Whoever, then, goes right, goes right only for the good of his own ‘self’. As for him who goes astray, say, “I am only a warner!”
27:93 And say, “All praise is due to God! In time He will show you His Signs, so that you will recognize them.” And your Lord is not unaware of whatever you do.
Many people in Iran are Shi'a. You know, they mostly don't use their reason. But, Are all Christians and Atheists, for example, using their reason and Allah-Given faculties ?! And Still, Allah has given them Free Will to choose their way. Only those who propagate shi'a beliefs know such fabricated hadiths and lies. Many other shi'as are like other people: some follow N2I, some follow western philosophers, and some follow Christians. Most of them follow nothing but conjecture. Falsehood can't unite, guide, and lead people truly, only the truth can.
Albeit, Every Human has to find the truth for him/herself regardless of the place he/she is living...
33:66 On the Day when their faces shall be tossed about in the fire, they will say, “Oh, We wish we had obeyed God, and obeyed the messenger!”
33:67 And they will say, "Our Lord! We obeyed our clergy and the leaders and it is those who led us astray from the path."
33:68 “Our Lord! Give them double punishment and banish them from your grace.” [14:28, 16:25, 34:31-33]
7:38 God will command them to join the previous uncivilized and civilized communities into the fire. Every later group will blame the earlier one, "Our Lord! These are the ones who misled us; double their punishment.” He will say, “Doubled for all”: but this you do not know.
[The first group violated the laws and misled others, and the second group was guilty of blind following and misleading their successors]
Have nice times :-)