Terrorist attacks don't strike by themselves like storm or thunder. What he's saying is that we should just shut up and take it, even if fanatic Islamics bomb our cities and our people in the name of Allah. We wouldn't want religious prejudice clouding our thinking when trying to defend ourselves.
What happened to the Japanese Americans was not based on religion. It was a culture and a race that we went to war with. Since this was a "Sneak Attack" and no one was sure just who to trust, the Japeneses Americans were interred. A viewing of the WWII war posters would bear out that we went to war with a culture whose race happened to be Japanese. So if another attack were to occur, would it be against the Muslim religion or the culture and race that breeds and supports the fanaticism?