In fact, NaruHina fans shouldn't feel threatened by how Naruto feels about Sakura, (and I think many of you do, otherwise it wouldn't be such an issue) because in the end it has absolutley no factor on how Naruto could potentially feel about Hinata at this point.
Actually, that's not true, the reason I think it's an issue is because NaruSaku fans insist
that that's how Naruto feels about Sakura. It's not defensive because of his feelings in the story, it's defensive against an overexaggerated interpretation of his feelings by the fans. We recognise that Naruto has yet to show a truly romantic intrest in Hinata, but we also know he likes people like her and shares a lot of things in common with her that can't be said for Sakura, and we also take into account SasuSaku, which is the most backed up pairing I've seen in the series besides a few other non-Naruto, Sakura, or Sasuke related pairings.
Also, you contradict yourself, you said that Shippuden is a new series entirely, then you start bringing up a bunch of evidence from pre-TS, not to mention the only evidence you brought up that had impact was vastly open to interpretation, which I won't go into other than that it only implies romantic intrest if you expressly think that way and no other way whatsoever, and I don't think that's even how Kishi implied most of those to be interpreted. Anyway, just going into post-TS would be pointless as anything that could be said about Hinata would msot likely be total bull, making your case incredibly limited, as the only scene so far we have showing direct interaction between Naruto and Hinata is incredibly NaruHina, and a cute one at that.