No, the reason I do stuff I am interested in, is because I am interested in it. Not because I am Nationalist. I even reenact the French, yet I am German.
Very different cultures, (For example, anything that is not European) are just not interesting to me. Sure, you can define that as some kind of Nationalism, I guess, but really it is not. It is where I grew up, so I am obviously more related and interested in it.
I don't care a crap about my ancestors either. For all I care, they could have been from China, I still would not be the slightest more interested in Chinese culture.