Personally, if there's one thing I hate more than bigots, it's when the people who were bigoted against suddenly think that because they were bigoted against, it automatically gives them the right to completely destroy the bigots.
As an Secular Humanist (I will not call myself Atheist, and by extention throw myself in the same boat as Antitheists, who I despise just as much as Theists) with many LGBT friends, I will agree that Card's statements infuriated me, and many of my friends. But we all still plan on seeing the movie. Why? For three reasons:
1) Forgive and forget. The battle is won. No matter what people say, the battle is pretty much won. Just like fighting continued after the surrender at Appomattox Courthouse during the American Civil War, there will still be legal battles after this Supreme Court decision. But it is almost certain that the battle is won. With the Supreme Court decision in place, groups like the ACLU can bring successful lawsuits against pretty much any anti-gay marriage law they choose. There will still be vocal opposition, but there has always been vocal opposition to change. If your goal is to win legally, AND obtain complete acceptance among people, then you will never win, as there will always be someone out there who hates you. Continuing to attempt to destroy your opponent after the end of battle is akin to winning a battle because the other army surrenders, and then having your men cut down the entire other army while they're unarmed and expecting mercy. We don't want to be those kinds of monsters. Way we see it, everyone is entitled to their opinions, whether offense or politically correct. But we can't go on hating those people forever. There are some special circumstances, like ordering the extermination of an entire ethnic group. But that didn't happen here.
2) Ender's Game dealt with something COMPLETELY different. Ender's Game dealt with the morality of using child soldiers, even if it came down to defending the human race. Ender takes a very clear physical and mental toll by the end, and the novel is all about how even when use for good purposes, using child soldiers is still a great moral crime, as you may create a soldier, but you murder a child in the process.
3) Given that the movie is being directed by the author of the book, it will probably be one of the better book-made-into-movie films of the decade. Not better than The Hobbit, of course, but still better than Twilight.
Yes, Card was an asshole. That much won't change. But by discriminating against the discriminator, we change nothing. If anything, we become just as bad as they do. Everyone is entitled to their opinion, no matter how politically incorrect it is, and the minute we start trying to destroy people for that is the minute we are no longer a free and open society.
And to me, that is more important than any other legal declaration.