I agree--most Americans have probably been going about their lives and not paying too much attention to this so far.
But I think this issue is going to be in news cycles for quite a while. The more news cycles, the more likely people will start to think about it, the more likely they will run into the friend who feels passionately about it, and the more likely they are to decide it doesn't belong in their America. (Or that if it does belong in their America, that it shouldn't be kept a secret.) It's important for those who feel strongly about this to speak up now.