Not a bit of sarcasm. There has been a massive increase in witches ever since those Harry Potter films and the same thing will happen with terrorists!
...Okay, yeah it was sarcasm. But, I'm surprised that you've met people carrying on that sentiment about Star Wars. I'm pretty sure the author of the article was joking, there were a couple lines that had me doubled over. Not a fleeting internet chuckle, but like honestly guffawing out loud. I've heard people attack the news, video games, television, or movies for somehow encouraging domestic terrorism through violence. But never the Star Wars franchise in particular.