First Amendment Terrorism

I've written before about Paul Sperry's book Infiltration, How Muslim Spies and Subversives have infiltrated Washington. Below is an excerpt from the book's Afterword:

Years ago in Philly, the FBI secretly recorded suspected Hamas operatives stating that the United States provides a secure legal base and a perfect haven from which to operate, because they can disguise their activities as religious activities protected by the Constitution and no one will question them because of the politically tolerant culture.

I.e., liberalism. I present to you exhibit A.