The Swiss have no problem with the mosques, they have objection on the Minarets alone. Besides, the Minarets were never the integral part of the Mosques erected in the early days of Islam. You may want to read the following article about the Minarets.
Minaret
Arabic: mināra
Tower near to, or built into, the structures of a mosque, which is used by the muezzin to call out the adhan in order to make people to come to prayers in Islam. The earliest mosques were built without minarets, and the action of adhan could be performed in many other locations. The hadiths tell us that the Muslim community of Madina called out to prayers from the roof of the house of Muhammad, a house that doubled as a house for prayers.
First around 80 years after Muhammad's death did the first minarets we know of appear. This happened in places as far between as Kairouan in Tunisia and Damascus in Syria. It is good reason to believe that the Great Mosque of Damascus, built in 705, was inspired by the churches of the city, yet the Muslim minaret served its own functions, continuing the old traditions from the house of Muhammad.
Minaret are now very much symbols of Islam, even if they technically are bid'a. Minarets are often adorned, high and striving to be as slim and elegant as possible. Modern minarets are often giving even more room for artistic achievements than in earlier times. The ground floor of minarets are always fitted into a square, with the higher parts of the minaret being everything from square to round many are even octagonal. On top there is a tiny room from where the muezzin either is or where the loudspeakers are. This room is covered with a pointed roof.
Early wahhabism outlawed minarets, a regulation imposed for only very short time. The Mosque of the Prophet in Madina has a record 10 minarets, lying right in the state of the wahhabi movement.
Source:
Minaret - LookLex Encyclopaedia
Early Mosques Without Minarets surveyed on Abu Dhabi Islands
I found this article very interesting. I didn't realize that mosques have not always had minarets. According to Dr. Geoffrey King, an expert in Islamic art and archaeology at the School of Oriental and African Studies at the University of London and now academic director of the Abu Dhabi Islands Archaeological Survey, early mosques, in many cases, were simple structures of natural materials pointed towards Mecca.
[Image - Muraykhi mosque, dating back to the 1930s, is one of the 45 studied by the archaeological team. It has been restored as a heritage museum. Image courtesy of The National Centre for Documentation and Research]
The minaret is a northern development out of Syria, he says.
The first minarets were introduced when the Muslims got to Damascus and built the Great Mosque, using the old temple there and utilising the old Roman corner towers, making them into what became minarets. All the places that were influenced by the very old Arabian tradition have none; that means east Africa and Oman and those on Delma are the same.
In all, Dr. King's team surveyed 45 mosques found on the islands.
"The simplest remains, built from small stones or slabs of beach rock, without roof or wall and ranging from one metre to 30 metres long, are impossible to date. Little more than defined spaces facing Mecca, they contained no dateable material kept clean and certainly not used as sites for cooking or other household chores, they yielded none of the detritus of daily life.
What is certain, however, Dr King said, is that these sites echo the oldest Islamic tradition, dating back to the reported provisions for prayer made during the Prophets military expedition to Tabuk, in present-day north-west Saudi Arabia, in 630: When they prayed, they just laid out some stones to face Mecca.
Source:
Passionate about History: Early Mosques Without Minarets surveyed on Abu Dhabi Islands