Having read through the comments, I've attempted to compile the concerns into something more readable.
Special thanks to radrcks, unironically, for clearing a lot of things up. and mystickeeper, who asked about it.
What the issue is NOT about:
1. “Brittany”, or “Sam”, or even “Bram”. They can feed off dirty cheerios on the floor and get food poisoning for all one cares. They’re two flat and dumb characters from a tragi-confu-med-rama. So the dissing of “Bram” by “Brittana” shippers because Brittany isn’t with Santana is not the central issue. It’s on the level of “Finchel” fans attacking the horse character on the show. It was merely a catalyst.
2. Labels. It is not about Brittany being with a female rather than a male. It’s pretty obvious that as a not-really/bi-curious/bicorn/bilingual she is attracted to both males and females, and therefore there is no issue with her dating either genders.
Lesbian (F) + Bisexual (F) ≠ Lesbian, [= "Les-bi-an"]
Lesbian (F) + Lesbian (F) = Lesbian
Bisexual (F) + Straight (M) ≠ Heterosexual
Straight (M) + Straight (F) = Heterosexual
OR. We could use mayonegg’s elegant and simplistic definition:
F + F or M + M (whatever the orientation) = queer
M + F or F + M (whatever the orientation) = heteronormative
What the issue IS about (and should be read in the following logical order)
1. Glee has rather self-indulgently commended itself for giving representation to the minority c.f. 2011 Glee: The 3D Concert Movie, where “the film portrays the series' influence on teenagers, including one who is gay named Trenton, one with Asperger syndrome named Josey, and a cheerleader with short stature named Janae” (quote directly lifted off Wikipedia). If this isn’t self-celebration I don’t know what is.
Segue: now, if that isn’t what the show has proclaimed itself to be, then I think the issue, though very important in itself, wouldn’t be as inflammatory as it is right now.
2. So the current criticism about Bram isn’t about Bram per se (see above), but the double standards with regard to the show’s representation of queer vs. heteronormative couples, based on the show’s branding of itself.
3. The proof is in the pudding: despite what the show’s producers have claimed, the fact is that for Brittany, as someone who identifies as bisexual, it took one episode for each romantic heteronormative relationship (after being established) to show/represent/portray the relationship’s first kiss c.f. Artie in S2E04, Sam in S4E09. On the other hand, even if you start dating the episodes from “Sexy” (S2E15), the time elapsed between the establishment of a romantic pairing, and the Brittany/Santana pairing’s first shown/represented/portrayed kiss is 20 episodes.
Segue: now, this isn’t about the kissing either. In fact I think many of the show’s original fans could do with less kissing and more storyline/plot development, but that’s besides the point.
4. Whatever the problem is behind the scenes – maybe they don’t know how to write about les-bi-an or lesbian relationships; maybe they didn’t have the opportunity to showcase Brittana as often as its fans would have wanted (although probably not); maybe the writers didn’t know what to do with Brittany so left her dumb (in all senses of the word) and just holding Santana’s hands in most scenes; maybe Ryan Murphy took the reins back from the new writers and declared his newfound "enthusiasm" for glee and gave Brittany something to do – the fact remains is that on screen, Brittany had little to no character or relationship development when paired with another female character, whereas her character was treated very differently when there was a male character involved. For a show that prides itself in showcasing the concerns of the minority, this double standard is glaring, and has been the focal point of criticism. To dismiss this criticism as anything else would be to miss the point entirely.
Segue: once again, even if all of these was the case, I don’t think the problem would’ve been as inflammatory as it is now
5. Enter Ryan Murphy: even if we ignore his obvious distaste for Brittana fans and his offensive “ignoring Brittana tweets” tweet, he went out of the way to mock the Lesbian Blogging Community. Maybe, maybe he was taking the mickey out of what he thought were ‘entitled’ (debatable and not relevant right now) Brittana fans hijacking his plots with their demands. Problem is, his pot shot made direct assertions at not just the show’s fans, but lesbians, and lesbian bloggers in general, characterising them as (I don’t know I can’t even remember the commentary) angry and violent.
6. It becomes homophobic when you attack not a relationship’s fans, but a particular community of individuals, even if that had not been your original intent. It becomes homophobic when you insinuate that they are heterophobes who will retaliate in violence when a bisexual female is seen to be dating a male.
Source: ontd_glee. Guest star: chordover. Lemme know what you think.
Next up: What is a Samcedes?