Is he going to demand that the Supreme Court be taken down also?
Good question. No, for now they won't. This is why: theirs is not, at this point, a consistent atheistic movement; if it were, this country would have a revolution. Instead this is judicial sabotage: take down soft targets. A prominent cross on government land is a soft target, like an ice cream parlor is a soft target for a bomb-thrower. Eventually, the soft targets will be taken down one by one: prayer in school, pledge of allegiance, public prayer of any kind, Ten Commandment monuments in courts, etc. By then the public will be anesthetized to these takedowns and then systematic cleanup of Christian expression will take place, -- a couple of decades from now.
Not long ago they were eulogizing Mandela. They had a good reason: he pioneered the politics of sabotage in South Africa, and lived long enough to see that country destroyed. We have something similar going on here.