On Wednesday during NBC’s special rolling coverage of the Islamic terror attack in New Orleans, correspondent intelligence community tool Ken Dilanian chose not once or twice, but three times to tie Islamic extremism to “extremist ideologies” like “far-right extremism.” The most notable came during NBC Nightly News and anchor Lester Holt — who was the only network evening newscast anchor working a rare holiday — asking a simple question: “What does this tell us about the state of ISIS as we...