Are both punk rock musicians, Spike Slawson and Greig Nori, from Canada? 
no
Greig Nori
Greig Andrew Nori (born November 21, 1974) is a producer and musician from Sault Ste. Marie, Ontario, Canada and is well known as the frontman, lead vocalist and guitarist of the pop punk band Treble Charger.
 In the late 1990s he began working as a producer with Sum 41 and was their in-house producer and manager until 2004.
 In 2007, Greig went back to the studio to produce for the pop punk bands Cauterize and Hedley, with their albums "Disguises" and "Famous Last Words", respectively.
Spike Slawson
Spike Slawson is an American punk rock musician, a member of Me First and the Gimme Gimmes, Swingin' Utters, Filthy Thievin' Bastards, Re-Volts, and Uke-Hunt.
The Dwarves Must Die
The Dwarves Must Die is the 2004 release by the American punk band Dwarves.
 It is the band's first release on the "Sympathy for the Record Industry" label.
 There are several cameos, including Dexter Holland from The Offspring, Nash Kato from Urge Overkill, desert rock icon Nick Oliveri, Josh Freese from The Vandals, Spike Slawson from Me First and the Gimme Gimmes, gangster rapper San Quinn, DJ Marz, and even the original Space Ghost himself, Gary Owens.
 The rather freeform departure from the standard thrash/punk/noise sound is obvious in this release, slightly more so than in previous Dwarves productions, perhaps because they have been producing music for almost 20 years; however the original sound of the Dwarves shows clearly in several tracks. For the Nights I Can't Remember
"For the Nights I Can't Remember" is a song recorded by Canadian pop rock band Hedley for their second studio album, "Famous Last Words" (2007).
 The ballad was co-written by the members of the band with the record's producers, Greig Nori and Dave Genn.
 It was released in November 2007 as the album's second single.
 In 2009, the song was re-issued digitally with their follow-up single. Treble Charger
Treble Charger is a Canadian rock band formed in 1992 in Sault Ste. Marie, consisting of lead vocalist and guitarist Greig Nori, and co-lead vocalist and guitarist Bill Priddle and current drummer Richard D Mulligan.
 The band, initially consisting of four members, had disbanded in 2006 and reunited in 2012.
 They began with a melodic indie rock style, but evolved into more of a pop punk band after signing to a major label in 1997. Motivation (Sum 41 song)
"Motivation" is a song by Canadian rock band Sum 41.
 It was released in January 2002 as the third single from the album "All Killer No Filler".
 Greig Nori appears on backing vocals. Autopilot Off (EP)
Autopilot Off is the first major label EP by the punk band Autopilot Off.
 It is the band's first release with the label Island Records and was produced by the then Sum 41 manager and producer Greig Nori.
 This was the first album by the band to feature their symbol - the split-in-half padlock - on the album cover art, which would then go on to feature on all of their future-album's cover art. Make a Sound
Make a Sound is the major label debut and final album of American punk band Autopilot Off.
 It was released on April 13, 2004, through Island Records and produced by then-Sum 41 producer and manager Greig Nori. Filthy Thieving Bastards
The Filthy Thieving Bastards is an American folk/punk rock group formed in 2000 in San Francisco, California.
 The band was originally a side project put together by Johnny Bonnel and Darius Koski of the Swingin' Utters.
 Spike Slawson (also from Swingin' Utters) later joined the band, along with recording engineer Randy Burk.
 Greg Lisher from Camper Van Beethoven guested on guitar for several songs on their second release.
 Their music is influenced by folk rock, Celtic rock, country music, 60's pop, and punk rock, with an acknowledged and oft-noted debt to the music of The Pogues. Handle This
"Handle This" is the fourth and final single from the album "All Killer No Filler" by the Canadian rock band Sum 41.
 The single was only released in Germany and included the title song and live versions of "Motivation" and "Makes No Difference" as back-up tracks, on the CD single.
 Sum 41 former in-house manager and producer Greig Nori played guitar on the song and a music video was made for the song.
 The video was not released along with the single, and it is only released on the Does This Look Infected Too?
 EP.