I suppose the Smoosh girls could have chosen other ways to express their disdain for the president, or they could have just kept their political opinions to themselves. But they didn't, and none of the "adults" -- parents, producers, publicists, record company executives -- who are responsible for guiding these girls thought to intervene.
So welcome to the culture war, Smoosh.
The way he is carrying on over them, you would get the idea that the girls of Smoosh are prattling on like Babs Streisand instead of casually wearing a button that you have to really be looking for to notice.
It must be getting hard to be a Bush supporter/defender these days . . .