[Luis Gonzalez]

"Between 1989 and 1998 the Islamic population in Europe grew by over 100 percent, to 14 million (approximately 2 percent of the population), according to United Nations statistics. During the same period, the Muslim population in the United States grew by 25 percent. Islam is the second-largest religious group in the world, with more than a billion members worldwide (some estimates put it closer to two billion). An estimated 4 to 6 million Muslims live in the U.S. today, and that number is growing. Islam could be the second-largest religion in America by 2015, surpassing Judaism, according to some estimates. By other estimates, Islam has achieved that rank already."

Christianity Today.

[rmlew]

Sounds like a threat to me.
Even if only 1% of Muslims are Islamists, 12 Million Iskamists worldwide and 40-50,000 in the US is a real problem.
It seems to me that Christians and Jews had better start reproducing at replacement levels, or we will be conquered by armies or immigrants.