AITA for Telling My Girlfriend That Her "Patriotic Kenny" Cosplay Is the Most Unironically American Thing I've Ever Seen and Now She Won't Talk to Me?

AITA for telling my girlfriend that her “Patriotic Kenny” cosplay is the most unironically American thing I’ve ever seen and now she won’t talk to me?

So my GF (24F) spent 3 weeks and like $400 making a “Patriotic Kenny” costume from South Park. Think Kenny McCormick, but his parka is a full-on American flag, his hood is an eagle’s head, and he’s holding a tiny bald eagle on a string that screeches “FREEDOM” when you pull its tail. She wears it to 4th of July block parties and screams “OH MY GOD THEY KILLED THE DECLARATION OF INDEPENDENCE!” every time someone drops a hot dog.

I told her it was the most aggressively, painfully, cringily American thing I’ve ever seen, but I meant it as a compliment because it’s so stupid it circles back to genius. She’s convinced I was mocking her “patriotic aesthetic.” I’m not wrong though, am I? TL;DR: GF made a cosplay that is the physical embodiment of “freedom isn’t free, it costs $14.99 at Spirit Halloween,” I called it patriotic, she got offended. AITA?