""A website is speech. It is not a bomb." Pretty clearly, Mr. Prince is unfamiliar with Mr. Justice Oliver Wendell Holmes and Schenk v. United States (1920), in which Justice Holmes wrote in the unanimous decision of the US Supreme Court that, "[T]he First Amendment could not be understood to provide an absolute right, and would not protect a person 'falsely shouting fire in a theater and causing a panic.'"
I guess it's in the eye of the beholder, but people with assault rifles and explosives, and an announced intention to murder innocent citizens of a democracy, would appear to present a somewhat greater threat than the fellow falsely shouting fire in a theater (or the antiwar and anti-defat activists in Schenk). It follows that providing them with a soapbox is not an exercise of a right, but a commercial decision trading monetary gain for spreading terror.