Sunni thinker Mowlawi Nazir Ahmad Salami has stated that the first condition or the foremost condition for unity is knowing the enemy.

 The full speech comes as follows:
 
In the Name of God, the Compassionate, the Merciful
I seek refuge in Allah from the cursed Satan
You will surely find the most bitter towards the believers to be the Jews and polytheists
We are on the eve of the Unity Week. I am going to present a short speech to dear viewers and listeners in connection with unity.
The first condition or the foremost condition for unity is knowing the enemy.
In my speech, which will take few minutes, I am going to talk about verse 27 of al Imran, which introduces Zionists as the biggest enemy of Islamic Ummah. I am going to present the highlights:
Taking a glance at chronology of Jews’ mischiefs and enmity of Zionists, clarifies that Zionists are arch enemies and source of difference in Islamic Ummah.
In Uhud battle, 300 of the prophet’s companions abandoned him and the Zionists at the time of the prophet were the cause of the rift. In Khandaq battle, again Zionists of those times coalesced the atheists and invaded Medina but failed.
In the crusades, which lasted for nearly 150 to 200 years from the 11^th to 12^th century BC, those were Zionists with their capital and plan that were behind the scene, though there were Christians in the scene.
 
Moreover, in the second decade of the 19^th century, i.e., from 1921 to 1924, Zionists were at work when Ottoman califate, which was symbol of Muslims’ power against the West, fell. The califate tore apart. In the 10^th Hijira Ottoman califate dominated majority of Islamic world and Safavids ruled Iran as Moguls were lords in the Indian subcontinent. These all were Muslims. Had enemy not plotted, Islamic unity would have been formed. But they knew well that if Ottoman califates, Moguls in Indian subcontinent and Safavids in Iran get united, enemies will have no foothold. Moreover, in the 10^th century, Ottoman califates were torn apart when they waged religious war between Ottomans and Safavids. These all were because of Jews’ mischief as Holy Quran referred to. I just mentioned the verse above.
After collapse of the Ottoman califate, promises were exchanged with Sharif Hussein. They said you undertake and admit the responsibility and custodianship of Hijaz and shrines and we will help you. Then, when Sharif Hussein was on a visit to one of the European countries for materialization of promises by the UK and Zionists, there he was told that we have given promise but as you know, in politics no promise can be practical.
 
Going further and in 1948 there was establishment of the occupying regime of Quds and occupation of Palestinian lands under the pretext of taking revenge of Holocaust.
Now the point is whether Holocaust was or not. Imagine it was; Palestinians were innocent; Nazis had done such a thing. Why Palestine should be occupied? Yes, in 1948, they occupied Palestine under the pretext of taking revenge of Holocaust. Happened or not,  it is up to Nazis it happened.
If done, those were Nazis behind the act and not innocent Palestinian people. They started to occupy Palestine. The move of Nazis brings to mind a Persian poetry: A blacksmith had committed a crime in the city of Balkh, now in northern Afghanistan, and a copper-smith beheaded in the city of Shushtar!
Furthermore, in 1947 when Indian subcontinent was divided, all three parties, i.e., representatives of Great Britain, Indian Congress and Muslims agreed that all the regions, where Muslims hold the majority, should be joined to Pakistan and the regions, where Hindus hold the majority, should belong to India and Indian congress. However, Zionists did not give it to Pakistan just because they did not want to let an Islamic country, i.e., Pakistan, to live in peace as Kashmir, majority of 90 percent of its population were Muslims. Until today, this is source of difference between Pakistan and India and thus far, three full-fledged wars have taken place just because of Zionists’ mischief for they did not wish formation of an Islamic country in powerful Indian subcontinent.
More recently, as far as relations with the trio islands of Abu Mousa, greater and lesser Tunbs, are concerned, as historical documents show, the islands belong to Persian land. The so-called Persian Gulf Cooperation Council states had not been formed those times and Saudi Arabia also had not been formed. These all belonged to Persian state. Today, again Zionists want bring a rift among Muslims, Iran and Arabs. When holding a session, Persian Gulf Cooperation Council countries raise the issue, while referring to Zionists.
Going further backward, Zionists did not stop mischiefs, trying to divide Muslims. They have always been source of difference. For example, they disintegrated southern Sudan and separated it to create another occupying regime at heart of the world of Islam.
Also, they raised Kurdistan region to divide Iraq. They try to tear Islamic countries apart under vain and baseless pretexts.
Their latest dirty move against Islamic Ummah was explosion of Beirut port three years ago, thus inflicting very heavy damage on Lebanon.
All these, that were presented to you in highlights, were among mischiefs of Zionists as Holy Quran explicitly says, “ You will surely find the most bitter towards the believers to be the Jews and polytheists.”  Jewish Zionists are arch enemies of Muslims and also atheists throughout history joined hands and entered Islamic countries by force to tear Islamic Ummah apart. Iqbal says, “You are an ignorant enchantress, look at the seditions in his sleeve, if you want to be safe from his deception, drive his camels out of your pond, his wisdom made everyone poor, and the unity of the Muslims was torn apart.”
 Peace, mercy and blessings of God be upon you all.