بِسۡمِ ٱللَّهِ ٱلرَّحۡمَٰنِ ٱلرَّحِيمِ
Dissension(Iktilaaf) is evil.
الْخِلاَفُ شَرٌّ
Evidences:
1.Aishah narrated that:
The Messenger of Allah said: "Al-Fitr is the day that the people break the fast, and Al-Adha is the day that the people sacrifice."
2. Narrated 'Abd al-Rahman b. Zaid:
'Uthman prayed four rak'ahs at Mina. 'Abd Allah (b. Mas'ud) said: I prayed two rak'ahs along with the Prophet (ﷺ) and two rak'ahs along with 'Umar. The version of Hafs added: And along with 'Uthman during the early period of his caliphate. He ('Uthman) began to offer complete prayer (i.e. four rak'ahs) later on. The version of Abu Mu'awiyah added: Then your modes of action varied. I would like to pray two rak'ahs acceptable to Allah instead of four rak'ahs.
Al-A'mash said: Mu'awiyah b. Qurrah reported to me from his teachers: 'Abd Allah (b. Mas'ud) once prayed four rak'ahs. He was told: You criticized 'Uthman but you yourself prayed four ? He replied: Dissension is evil.
3. 'A'isha (Allah be pleased with her) reported:
Allah's Messenger may peace be upon him) said to me: Had your people not been unbelievers in the recent past (had they not quite recently accepted Islam), I would have demolished the Ka'ba and would have rebuilt it on the foundation (laid) by Ibrahim; for when the Quraish had built the Ka'ba, they reduced its (area), and I would also have built (a door) in the rear.
Sahih Muslim 1333 , Sunan an-Nasa'i 2900, Sahih Bukhari:1586
http://sunnah.com/muslim/15/444 , http://sunnah.com/urn/1080680
Lesson
if it is permissible for the Muslim to avoid some of the recommended matters in order to win people’s hearts, then shunning what is forbidden is required with even greater reason. Shaykhul-Islam Ibn Taymiyyah, may Allaah have mercy upon him, said, “A Muslim may not do what is recommended if doing it would incur graver evil that outweighs the sought benefit
Thus, the Prophet, sallallaahu ‘alayhi wa sallam, gave up the opinion that he believed to be the best of the two options and adopted the other one given its outweighing benefit. That is, the people of Quraysh were close to the pre-Islamic era and the idea of demolishing the Ka'bah would have driven them to become averse to Islam. Hence, the evil consequences were more probable than good ones. Therefore, Imaam Ahmad and other scholars, may Allah have mercy upon them, ruled that it is favourable for the Imaam to give up what he sees as a better choice, if this would foster more accord and rapport for those led in prayer.
4. Narrated Ibn `Umar:
On the day of Al-Ahzab (i.e. Clans) the Prophet (ﷺ) said, "None of you Muslims) should offer the `Asr prayer but at Banu Quraiza's place." The `Asr prayer became due for some of them on the way. Some of those said, "We will not offer it till we reach it, the place of Banu Quraiza," while some others said, "No, we will pray at this spot, for the Prophet (ﷺ) did not mean that for us." Later on It was mentioned to the Prophet (ﷺ) and he did not berate any of the two groups.
Sahih al-Bukhari 4119
http://sunnah.com/bukhari/64/163
5. Narrated Ibn Mas`ud:
I heard a person reciting a (Qur'anic) Verse in a certain way, and I had heard the Prophet (ﷺ) reciting the same Verse in a different way. So I took him to the Prophet (ﷺ) and informed him of that but I noticed the sign of disapproval on his face, and then he said, "Both of you are correct, so don't differ, for the nations before you differed, so they were destroyed."
Sahih al-Bukhari 3476 ,Sahih al-Bukhari 5062
http://sunnah.com/bukhari/60/143 , http://sunnah.com/bukhari/66/87
Fatwa:
Question (asked to Sheik Bin Baaz (Rahimahullah)): Is it permitted to leave off saying Aameen aloud in the Prayer, and to not raise ones hands (raf’ al-yadayn)?
Response: Yes, if he is among people who do not raise their hands, nor do they say Aameen aloud, then it is better for him not to do it in order to bring their hearts together. [This is] for the purpose of calling them to goodness, teaching them, showing them the right way and for him to be able to rectify them.
This is because, whenever a person opposes them they will disdain him. They consider [their actions of not saying Aameen] as being from the religion. They consider not raising their hands in any part of the prayer except the initial Takbeer (takbeerat al-Ihram) to be from the religion, They have lived their lives upon this along with their scholars.
Similar to this is not saying Aameen aloud. This is [an issue of] well-known differing among the people of knowledge. Some of the people of knowledge have the opinion that one should say Aameen aloud, whilst others say one should not say it aloud.
It has been narrated in a Hadeeth that the Messenger (sal Allaahu alayhi wa sallam) raised his voice [saying Aameen in the prayer], and in other narrations that he did not. Despite the correct opinion being that it is recommended (Mustahabb) to say Aameen aloud, it is a recommended action (Mustahabb), and therefore leaving it [may also] be recommended (Mustahabb).
A Believer does not perform a recommended action if it leads to separation, differing and tribulations. Rather, a Believer and a Daa’ee leaves off a recommended action (Mustahabb) if by not doing it will bring about a greater common benefit.
An example of that is that the Prophet (sal Allaahu alayhi wa sallam) did not demolish the Ka’bah and rebuild it on the foundations laid by Ibraheem; He [justified this by] saying:
The Quraysh have only recently left disbelief
For this reason, he left the Ka’bah as it was and did not change it – may peace and blessings be upon him – for the greater common benefit.
Shaykh al-Islam Ibn Taymiyah (may Allah have mercy on him) said:
It is also permissible for a man to forego something that is preferable, in order to soften hearts and unite people, lest they be put off from what is in their best interests. For example, the Prophet (blessings and peace of Allah be upon him) decided not to rebuild the Ka‘bah on the foundations of Ibraaheem, because Quraysh had only recently left Jaahiliyyah behind (and were new in Islam), and he was worried that they may be put off by that. He thought that the issue of uniting people and softening their hearts took precedence over the issue of rebuilding the Ka‘bah on the foundations of Ibraaheem. Ibn Mas‘ood said, when he offered the prayer in full behind ‘Uthmaan, although he disliked that and objected to him about it, and he was questioned about that: “Dissent is evil.” Hence the imams or leading scholars, such as Ahmad and others, stated that the same applies in the case of the basmalah, and praying Witr as three continuous rak‘ahs, and other issues in which one may turn from that which is preferable to that which is permissible in the interests of softening the hearts or the obligation of teaching them the Sunnah, and so on.
End quote from Majmoo‘ al-Fataawa (22/436, 437).
Good Article:
More Reference article on Ismail Kamdar I Tolerance of Fiqh Issues http://muslimmatters.org/2013/01/11/ismail-kamdar-tolerance-of-fiqh-issues/