Islam is the only religion in the world that has a developed doctrine, theology and legal system that mandates violence against unbelievers and mandates that Muslims must wage war in order to establish the hegemony of the Islamic social order all over the world.
Now these things are objectively verifiable facts. Anyone can look at the Koran, anyone can look at the Muslim sources, the Muslim history, Muslim legal texts and so on and find that to be true.
It's actually better to watch the tiny screen version online rather than read the poor quality transcript because there are several video clips that make no sense as text. The clips are from a hard-hitting documentary, "Islam: What the West Needs to Know," in which Spencer appeared along with several other little-seen experts, including Serge Trifkovic, author of "Sword and the Prophet, and Walid Shoebat, the ex-Palestinian terrorist who converted to Christianity.
Robert Spencer has written several increasingly successful books which do not conform to the "Religion of Peace" propaganda put out by terror-supporting groups like Council on American Islamic Relations. As a result, he doesn't get many calls for appearances on the MSM and lives in a secret location to avoid the fellows sending death threats. So it goes when you are working to save western civilization.