So...you know that you're going to have characters arrested for being gay.
Do you:
a) develop airtime and relationships for them over the years to make viewers feel more strongly that this is a terrible injustice
b ) make it clear that there is no "right" or "wrong" way to be gay or love your own gender, that you will be brought down no matter what by bigotry and hate
or...
c) make both gay men ciphers, cast one of them in a negative light (a prostitute who sells out his clients), make the other as frivolous as possible season after season (gives up family secrets in exchange for a hot ass, makes sex eyes with total strangers at his sister's wedding, only interest in a political marriage to Sansa that would pay huge dividends is that he got to plan the wedding), and then make sure the latter is warned about being so indiscreet about his sexuality, so that viewers who feel gay men "flaunt" their sexuality will feel justified in believing that both men deserve whatever they get (with the only other affected characters being extras in a brothel).
Choosing c, and making this religious cult look like that cult in the DW episode where Donna Noble and David Tennant went to Pompeii, guaranteed that these scenes had all the dramatic power of Podrick Payne doing the funky chicken.
I would guess that 90-95% of the viewers don't give a rat's ass if Olyvar or Loras die, or if all gay characters on the show (who are treated as irrelevant and invisible) are shunted off somewhere, and who can blame them, really? That's what happens when showrunners go for a half-assed attempt at being topical and don't even have the integrity to present Loras and Olyvar as anything but somewhat skeevy plot devices.
And how stupid did Margaery look in expecting anything from her child husband when she knew he had no ability to lead at his age and she knew that his mother controlled him?
Did she get a lobotomy in early season 4?