Captainstabbin said:
If fag characters are such a great idea, invent your own. Make your own fag hero movie and see how well it does.
I can think of several likely reasons why they push to retcon existing characters in preference to demanding
original LGBTBBQEIEIO characters in comics.
I suspect those who push for such things sincerely do so as a shortcut to visibility and acceptance for the targeted brand of snowflakery. They recognize, consciously or not, that any
new character created with their particular quirk from the beginning will be little more than a token, as it will have no background or persona independent of the identity issues being pushed in the name of "inclusiveness" and "diversity". Worse, the authors/artists would be so constrained in handling the character with the required sensitivity and authenticity while avoiding any stereotypes or the appearance of appropriation that they couldn't possibly make it interesting - it would be transparently 100%-pure Mary Sue. So, not just a token but a risible and boring one, and therefore an embarrassment to the group it was intended to represent and promote a positive image of.
Retconning an existing character exploits the "goodwill" earned from previous work to get around this. You already know the character, so its human shortcomings and tragic flaws and lapses in judgment necessary for an interesting story are individual traits and don't reflect on the victim group it now suddenly represents. And the character can be just as obnoxiously preachy about the message as a token, but the obnoxiousness is tempered by the bookshelf of non-message past work stretching out behind it. Not to mention that that goodwill greases the skids for acceptance in the same way a personal relationship in real life can survive one of the parties "coming out": "Okay, sure, he's gay, but he's still the same Bob I've known all these years." They anticipate a gradual "getting used to it" by the audience after the shock wears off, and are happy to accept this as "acceptance" no matter that it's a counterfeit one.
On the other side, though, are the people pushing this as an expression of spite. As others have stated above, these "activist fans" only seem to go after the superheroes who are moral and masculine (with the possible exception of Spiderman, who strikes me as emo), as an obvious effort to destroy traditional male role models by making a mockery of their morality and masculinity. Some of the spiteful activists probably just enjoy destroying the happiness of those who disagree with or reject them by vandalizing something those people revere, rubbing their noses in things they don't care enough about or would simply rather not see.
But there's also an element of intellectual corruption at work. Just as with propaganda and rallies and such in tyrannical regimes, the point of the exercise is to undermine your integrity by coercing you to play along with the charade that something you know is bad or wrong or false is in fact good and right and true: "Cap has always been teh gay with Bucky". These sorts of people may indeed love the oppressed as much as they claim to, but in the end they hate other people's notions of virtue and integrity even more, and delight in tearing them down. Even if doing so entails hypocritically "shaming" those notions of virtue and integrity by associating them with a cause that
they themselves champion as good.
Obviously, the latter goals are things you simply cannot accomplish with original, built-to-spec SJW characters.