Might want to reign in your dogs of war there, Scoliosis.
We don't actually know if Nintendo was the sole reason Snake wasn't in the base games. We can only theorize that they had a role based on their feelings on Snake before Sakurai convinced them Snake was a good idea.
While Sakurai was how Snake got in Brawl, he still could very well have played a role in Snake's absence. Not out of malice, I would imagine.
Furthermore, while it's not Konami's or Kojima's fault for Nintendo not having hardware for high-scale games such as MGSV, it's not Nintendo's fault that there are no Metal Gear games made for the hardware they do have.
The Gamecube could handle Twin Snakes.
The 3DS could handle Snake Eater.
Why in the bloody Hell can the Wii U not get a Metal Gear of it's own, even if it wouldn't be V?
Just because Kojima "doesn't know what to do with the Gamepad"? Give me a break.
If Sakurai was the guy who Snake into Smash, I can't possibly imagine he would have left him out.
The reason I say it's Nintendo's fault is mainly because it just isn't feasible for there to be a Metal Gear on their systems. Or so it seems. I'm not even talking graphics, i'm talking the economic feasibility. If they're losing money even porting MGSV to the Wii U, why bother?
The main reason I say that is because I see users on here all the time complaining that, "X doesn't support Nintendo, therefore they shouldn't be in Smash". Would YOU support Nintendo if your product didn't sell well?
If I remember correctly, Kojima had interest in doing something unique with the Gamepad for Metal Gear (probably wont happen now), but it wouldn't be MGSV necessarily.
As far as who's to blame for Snake not being in, I can't help but believe it was Nintendo. They were the ones who had an issue with him in the first place, Konami has little to no reason to not allow him, Kojima WANTED him, and Sakurai apparently had no issue in the first place. To me, that means it's Nintendo.
I probably came off real pissed off and what not. But I'll admit, I'm salty about it. Brawl introduced me to MGS, and it's one of my favorite series now. Snake became my main in Brawl and now he's gone. Probably for nothing else than Nintendo still thinking he's "too Sony" despite the incredibly positive reaction to his inclusion.
Maybe it's not entirely fair to blame Nintendo for it, but it's hard not to when I look at their 3rd party support in general. It sucks. They rely way too heavily on their own properties and it's hurting them. They haven't learned from past mistakes. If they had a focus on third party titles, perhaps like Metal Gear, their consoles would be doing better.