4th of July means Fireworks, Parties, and Anti-American Proproganda...wait what?

I guess the 4th of July for some means using their free speech to piss on America. I don't understand this mentality...if you don't like capitalism or if the "US ruined your life," why not leave and live somewhere else? Anyways, the following pictures were taking at a gallery in San Francisco for a special 4th of July viewing. For the rest of the pictures of this leftist art propoganda go this site
Source (same as link above): http://www.zombietime.com/anti-july_4th_sf/