Hillary Clinton could not stop showing her agreement during a roundtable in Los Angeles on Thursday, nodding her head almost without a break for at least three-and-a-half minutes during one man’s remarks. Salam Al-Marayati, the head of the Muslim Public Affairs Council, spoke at length near the end of the roundtable with other Muslim community leaders about, among things, the positive role Muslims could play in the United States in combatting radicalization. Clinton, seated to his right, nodded fervently throughout his speech. She also nodded a lot at the other speakers that discussed myriad issues involving the American Muslim community....