#LaunchAmerica is the hashtag they are using to celebrate again having a launch on US soil.
I don't think this is really about nationalism ... it is more about getting US citizens excited, so they can push for greater funding for NASA and space exploration.
Let me continue. In my opinion, the more nations which have active and usable launch facilities and vehicles, the better it is for ISS. I would welcome launches from China, India, Brazil, and many other nations to help fully internationalize the space station.