This is so incredibly hilarious.
As is your perpetual argumentum ad ignorantiam in this thread. It's easy to argue against the punk influence when you have barely listened to punk. Have you checked out that Discharge album yet? How about listening to the chorus of Skrewdriver's "Antisocial" from 1977? Sound a bit thrashy? Maybe The 4-Skins song "One Law For Them" from 1981? Here is the situation: In the early 1980s, metal became faster, more aggressive and more violent in sound and subject matter with the emergence of thrash, death and black metal. A few years earlier punk became faster, more aggressive and more violent in sound and subject matter. You are trying to pass this off as a coincidence.
Re: "Jump in the Fire". Listen to the vocal lines in that song, and try to tell me that sounds more like a typical blues vocal pattern than a punk one. Or show me a blues song with fast power chord riffing more similar to that found in "Jump In The Fire" than hundreds of punk songs to predate it.
Here are some metal bands who have covered punk bands:
Metallica (Discharge, Ramones, Misfits)
Sepultura (Discharge, Bad Brains)
Anthrax (Ramones)
Slayer (Lots)
Destruction (The Exploited)
Megadeth (Sex Pistols)
Sodom (Ramones)
Motorhead (Sex Pistols)
Holy Moses (Dead Kennedys, DRI)
Machine Head (Discharge)
Children of Bodom (Ramones)
Grand Belial's Key (GG Allin)
Cradle of Filth (Misfits)
Deceased (DRI)
Carpathian Forest (Discharge)
The Meads Of Asphodel (Discharge)
...evidence of punk's direct influence on metal. Note the presence of virtually every major thrash band on that list. How many blues tracks did these bands cover? Classical pieces? Jazz songs?
Isn't it just as likely that the D-beat was learned from Diamondhead ?
It's a punk drumming technique. This is evidence of punk influence in two of the most important and influential metal bands of the 1980s. It's as direct an influence as any classical/jazz/blues techniques that found their way into metal through prog rock or what have you.
Look at the history: no combination of jazz, classical, blues, early 1970s metal, prog rock, etc. will give you thrash, death or black metal. You need to factor in the punk influence to get the speed, tone, violence and aggression to jump start metal's evolution in the early 1980s.