Hard to take advice from someone who uses the term “radical Islam.” Any Muslim who is not actively trying to turn our country into Dar-al-Islam, meaning a sharia dominated land where non Muslims are killed or subjugated, is heretical to his religion. It’s right in the book.
The people this author consider “non-radical” are either heretical or, more likely, practicing one of the many forms of Islam approved deceit for Muslims in an infidel land.