That's funny. What's the deal with wanting to separate everything? Bavaria is somehow not German, to her? It's a region of Germany, yes? Like saying West Coast or Cascadia is not American? Guess I don't get it since I don't live there.
"Germany" was a bunch of mostly autonomous kingdoms for thousands of years. The smaller kindgoms were usually getting squeezed by Prussia and Austria, as both jockeyed for power. Modern Germany was mostly formed in the late 19th century. Even then, as part of the German Empire, Bavaria was still a semi-independent monarchy with their own army, until around 1920.
So, Bavaria is a tiny little bit like Texas, although they were independent for a much longer time. I don't want to get all political or anything, but there are some people in Texas who are Texans first, Americans second, who want to secede, and there are Bavarians who want to secede as well. I've also heard people say the west coast isn't "real America" so the sentiment isn't unusual. Whether you agree with it or not, it exists.