Islamic Sharia Law:
Adult males may marry a girl as young as one year of age, however, cannot consummate the marriage until she is ready
(first menses is the determining factor for Islamists). Thus, if the child has a period as early as 9 years of age (which Muhammad's Aisha did, he can consummate the marriage.
Most mosques being built are funded by the Saudis, who are Wahabis, a strict version of Islam, which adheres to that Sharia principle of law and most Muslims coming into the United States are Sunni, of which Wahabi is part of.
Once you have enough Muslims in the country to make changes to the government, they will implement Sharia and pedophilia will become a practice.
Only way to stop it is to stop the influx of Muslims and ensure that their numbers remain small within the country.