...It would appear that the woman is not trying to claim that LGBT people don't exist, but that it is a lifestyle, not some sort of "type of human". To be honest, I find the notion that being LGBT is a lifestyle far less offensive than the notion that LGBT people are some alternate creature within the homosapien species.
Perhaps her wording was less than ideal for the concept she was trying to get across?
Regardless... Even if her concept was worded well it would still be kind of ...flawed, though a lot less offensive.
I don't know what's less believable though, the fact that there are people like the woman quoted making arguments this obviously flawed or the fact that this supposedly warrants an in-depth discussion. I mean honestly! Are we really surprised by this? Haven't we demonized the right wing enough by kicking a horse that should idealistically be dead at this point that this sort of thing should come to no surprise to anyone by now? <___>
Oh wait... This is the demonizing at work. My bad.