Ennahda, the Islamic party in Tunisia, won 41% of the seats of the Tunisian constitutional assembly last month, causing consternation in the west. But Ennahda will not be an exception on the Arab scene. Last Friday the Islamic Justice and Development Party took the biggest share of the vote in Morocco and will lead the new coalition government for the first time in history. And tomorrow Egypt's elections begin, with the Muslim Brotherhood predicted to become the largest party. There may be more to come. Should free and fair elections be held in Yemen, once the regime of Ali Abdullah Saleh falls, the Yemeni Congregation for Reform, also Islamic, will win by a significant majority. This pattern will repeat itself whenever the democratic process takes its course.

In the west, this phenomenon has led to a debate about the "problem" of the rise of political Islam. In the Arab world, too, there has been mounting tension between Islamists and secularists, who feel anxious about Islamic groups. Many voices warn that the Arab spring will lead to an Islamic winter, and that the Islamists, though claiming to support democracy, will soon turn against it. In the west, stereotypical images that took root in the aftermath of 9/11 have come to the fore again. In the Arab world, a secular anti-democracy camp has emerged in both Tunisia and Egypt whose pretext for opposing democratisation is that the Islamists are likely to be the victors.

But the uproar that has accompanied the Islamists' gains is unhelpful; a calm and well-informed debate about the rise of political Islam is long overdue.

First, we must define our terms. "Islamist" is used in the Muslim world to describe Muslims who participate in the public sphere, using Islam as a basis. It is understood that this participation is not at odds with democracy. In the west, however, the term routinely describes those who use violence as a means and an end – thus Jihadist Salafism, exemplified by al-Qaida, is called "Islamist" in the west, despite the fact that it rejects democratic political participation (Ayman al-Zawahiri, the leader of al-Qaida, criticised Hamas when it decided to take part in the elections for the Palestinian legislative council, and has repeatedly criticised the Muslim Brotherhood for opposing the use of violence).

This disconnect in the understanding of the term in the west and in the Muslim world was often exploited by despotic Arab regimes to suppress Islamic movements with democratic political programmes. It is time we were clear.

Reform-based Islamic movements, such as the Muslim Brotherhood, work within the political process. They learned a bitter lesson from their armed conflict in Syria against the regime of Hafez al-Assad in 1982, which cost the lives of more than 20,000 people and led to the incarceration or banishment of many thousands more. The Syrian experience convinced mainstream Islamic movements to avoid armed struggle and to observe "strategic patience" instead.

Second, we must understand the history of the region. In western discourse Islamists are seen as newcomers to politics, gullible zealots who are motivated by a radical ideology and lack experience. In fact, they have played a major role in the Arab political scene since the 1920s. Islamic movements have often been in opposition, but since the 1940s they have participated in parliamentary elections, entered alliances with secular, nationalist and socialist groups, and participated in several governments – in Sudan, Jordan, Yemen and Algeria. They have also forged alliances with non-Islamic regimes, like the Nimeiri regime in Sudan in 1977.

A number of other events have had an impact on the collective Muslim mind, and have led to the maturation of political Islam: the much-debated Islamic Revolution in Iran in 1979; the military coup in Sudan in 1989; the success of the Algerian Islamic Salvation Front in the 1991 elections and the army's subsequent denial of its right to govern; the conquest of much of Afghan territory by the Taliban in 1996 leading to the establishment of its Islamic emirate; and the success in 2006 of Hamas in the Palestinian Legislative Council elections. The Hamas win was not recognised, nor was the national unity government formed. Instead, a siege was imposed on Gaza to suffocate the movement.

Perhaps one of the most influential experiences has been that of the Justice and Development Party (AKP) in Turkey, which won the elections in 2002. It has been a source of inspiration for many Islamic movements. Although the AKP does not describe itself as Islamic, its 10 years of political experience have led to a model that many Islamists regard as successful. The model has three important characteristics: a general Islamic frame of reference; a multi-party democracy; and significant economic growth.

These varied political experiences have had a profound impact on political Islam's flexibility and capacity for political action, and on its philosophy, too.

However, political Islam has also faced enormous pressures from dictatorial Arab regimes, pressures that became more intense after 9/11. Islamic institutions were suppressed. Islamic activists were imprisoned, tortured and killed. Such experiences gave rise to a profound bitterness. Given the history, it is only natural that we should hear overzealous slogans or intolerant threats from some activists. Some of those now at the forefront of election campaigns were only recently released from prison. It would not be fair to expect them to use the voice of professional diplomats.

Despite this, the Islamic political discourse has generally been balanced. The Tunisian Islamic movement has set a good example. Although Ennahda suffered under Ben Ali's regime, its leaders developed a tolerant discourse and managed to open up to moderate secular and leftist political groups. The movement's leaders have reassured Tunisian citizens that it will not interfere in their personal lives and that it will respect their right to choose. The movement also presented a progressive model of women's participation, with 42 female Ennahda members in the constitutional assembly.

The Islamic movement's approach to the west has also been balanced, despite the fact that western countries supported despotic Arab regimes. Islamists know the importance of international communication in an economically and politically interconnected world.

Now there is a unique opportunity for the west: to demonstrate that it will no longer support despotic regimes by supporting instead the democratic process in the Arab world, by refusing to intervene in favour of one party against another and by accepting the results of the democratic process, even when it is not the result they would have chosen. Democracy is the only option for bringing stability, security and tolerance to the region, and it is the dearest thing to the hearts of Arabs, who will not forgive any attempts to derail it.

The region has suffered a lot as a result of attempts to exclude Islamists and deny them a role in the public sphere. Undoubtedly, Islamists' participation in governance will give rise to a number of challenges, both within the Islamic ranks and with regard to relations with other local and international forces. Islamists should be careful not to fall into the trap of feeling overconfident: they must accommodate other trends, even if it means making painful concessions. Our societies need political consensus, and the participation of all political groups, regardless of their electoral weight. It is this interplay between Islamists and others that will both guarantee the maturation of the Arab democratic transition and lead to an Arab political consensus and stability that has been missing for decades.

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