The history of Europe hasn’t exactly been peaceful.
Bringing an end to our wars by tying the countries closer together is what the Union is all about. If this project should fail there is every reason to be worried. So I can’t really imagine why anyone with a tiny knowledge of history would be gloating about the recent setbacks. It’s not a perfect Union but it’s the only one we’ve got. Let’s take good care of it.
The alternative is distinctly unpleasant.