Moderate Muslims are often silent, especially in some regions of the Middle East because they have often be assassinated. Many in areas outside of the Middle East want low profiles because family members have been arrested or assassinated.
The plight of the moderate Muslim has often been a rather complicated situation.
Here's a Wikipedia link to the liberal Islamic movement. Here you'll see links to schools of thought and various leaders who advocate a more moderate form of Islam.
http://en.wikipedia.org/wiki/Liberal...s_within_Islam