I think the reason Nintendo fans get bent out of shape over this kind of stuff is mainly because they want Nintendo to be held up to that AAA standard of "being included just because it's a big AAA game" even though it's been a niche for quite a while. GB tends to treat it like a niche, with Jeff and Brad (although, really just Jeff, Brad's pretty cool with a lot of Nintendo games) coming from a background that doesn't really line up with the majority of Nintendo fans here.
Yeah, I can certainly see this. I think the big head-scratcher for me is the implication (painting in broad strokes here) that if one is not a vocal Nintendo fan then they're an Enemy of the State. What makes me put on the brakes is the understanding that not every GB member is going to be a Nintendo guy. Nor do they need to.
Dan is treated as a hero for bringing Nintendo into the conversation. Patrick and Alex to a lesser degree. But in my mind, all the guys have their unique tastes to bring to the table.
Brad is big on MOBAs. Drew gets jiggy with the hardcore flight sims. Jeff likes 1v1 fighters and retro classics. Patrick likes smaller indies & horror. Alex is the sports guy. And yes, Dan champions Nintendo.
So what's the problem here? That Jeff is dismissive of Nintendo? That's just one piece of a very diverse pie. And quite frankly, I find the insults thrown his way for not liking/supporting the company or its fans rather selfish. I personally think the podcast and video content from Giant Bomb would be an utter bore if every contributing member were clones of each other in regards to personal tastes.
I can see where Nintendo fans might feel slighted by Jeff's dismissive attitude toward the company/fans, but honestly isn't that liberally sprinkled around in other areas? How much griefing do Ubisoft, EA, Activision, etc. "enjoy" when they mess up? How much trashing has MS gotten over the past couple years over Xbox One?
Everyone takes their lumps in due course. Just as everyone enjoys their time in the sun when earned. Not sure why Nintendo has to be an unassailable special snowflake in this regard.
The guys are just gonna like what they like, simple as that. Seems kinda foolish to expect their personal tastes to line up with one's own. Even doubly so to get bent out of shape over it.