I mean, okay, maybe, but that just means that they'd be hosting a conference about "nazis suck" and hey, I'm okay with that. That's a message I can get behind.
So when someone decides to hold a dev conference but chooses to disallow any gay/lesbian developers, is that also totally okay?
Since when is ALL discrimination bad? I discriminate against shitty people all the time, and so do you. Don't even pretend you don't, no one will believe you.
You're projecting a bit. I try hard -- consciously -- not to shut down and shut out people who need grace as much as I do (either more or less externally-visibly).
Your own code of ethics is not universal. There are people who think and operate differently from you.
Which is exactly the point of not discriminating whenever it's avoidable.