Technically, everyone's right. It is called "The White House" for a reason. The reason is that it was painted white, and it was a house. Still, Spider Sense tells me that that's not what these tweeters meant when they tweeted. (Spider Sense plus the fact that that one guy used the N-word.)
I don't think everyone in that image (and the countless others who have tweeted "It's called the White House for a reason") is racist, though I'm sure some of them are. I think most of them are either trolling or trying to be funny and failing miserably. On some intellectual level, I'm aware that trolls, racists and idiots exist year-round. I know that. But most of the time, I'm really good at avoiding those people, because I exclusively hang out with my dog and the seven or eight people who like the same TV shows I like and don't mind that I sweat all the time.
But now it's election season, which means I'm going out of my bubble to consume absolutely everything that's vaguely connected to the campaigns, including horrible tweets like the ones posted above. This year, we get to see the idiots announcing their presence in racist tweet form. Four years ago, they announced their presence at McCain rallies, calling President Obama a terrorist, or again on Twitter, saying stupid, sexist things about Sarah Palin.
I'd worked so hard building a little world for myself full of positivity and corn dogs, and that world comes crumbling down every time an election rolls around and I'm forced to confront the reality that, even though most of America is full of levelheaded, kind and hardworking people, there exists a pocket of hate-filled morons, right around the corner.