Nofx usually don't give any interview, and these are what I have found from Internet and some magazines.
Interview with Fat Mike at year 1993 just before they release White trash two heebs and a bean.
Epitaph interviews: Schmoozin' with Fat Mike.
Epitaph interviews: Punk 'n disorderly Fat Mike interview.
Epitaph interviews: Unknown zine Fat Mike interview.
Fat Mike interview from warped tour
Interview with Fat Mike when they did Punk in drublic
Interview with Nofx from Flipside magazine.
Another interview with Fat Mike
Interview with El Hefe: Take a look what Hefe thinks about drugs.
Interview with Erik Sandin: the drummer boy
An article about Nofx when they did Heavy petting zoo
An article when Nofx did gig in England with Snuff