Rep. Devin Nunes (R-CA) calls Rep. Justin Amash (R-MI) "al Qaeda's best friend in Congress."
Amash is a fairly doctrinaire libertarian. So not surprisingly he's very anti-NSA, anti-surveillance for a Republican. May or may not be your cup of tea. But perfectly legitimate positions. Amash is also Arab-American (of Christian Syrian and Palestinian extraction.) So it's a slur on a couple different counts.