Islam uses the notion of taqiyya, where Muslims, consciously or unconsciously, hide their true opinion as they are not in the majority. If I ask a Muslim in the street what he thinks about homosexuality, he will either remain silent or give a politically correct answer. As the number of Muslims increases, even when they are not violent, the ideology of Islam will become more prominent and society will change.
"Geert Wilders: an interview with the Netherlands' controversial politician." Contemporary Review (22 March 2009)