The title appears to be heavily editorialised. Perhaps for an American audience? The term “unconstitutional” doesn’t really make sense in the EU context - you can either refer to one of the member state constitutions (TFA contains a passing reference to your German constitution), but they are quite different from each other and so you would want to specify; or it can not against the treaties that set up the Union, but no one calls this “unconstitutional”.
The American constitution, of course, does not bind the EU in any way.
The American constitution, of course, does not bind the EU in any way.