That's not being celebrated, that's just being the default. It doesn't feel celebratory at all, it's just normal and commonplace. People aren't celebrating heterosexuality when they put those ads up, they just know that most people are bound to be heterosexual and so they wanna appeal to the most folks possible. It doesn't feel like someone is somehow celebrating my special way of being when I see an ad, I don't even notice it being at all about me, even when it includes heterosexual people or men or what have you.
In fact, when one does go out of their way to celebrate such groups, THAT is being perceived like an attack in the way you describe. I remember things like a straight pride parade for example being ridiculed and attacked in just the manner that you envision here.
We all agree that any political figure screaming anyone isn't human is an idiot, already, and that's what really matters here. That's what the culture actually consists of and the values it has. That crazies exist doesn't undo any of that.