Well, you chose the word. I understood you to mean people having a common identity as a European, in addition to their many other identities (dad, poet, Belgian

Well, you chose the word. I understood you to mean people having a common identity as a European, in addition to their many other identities (dad, poet, Belgian, whatever). Which I would say is a common thing. If you were referring to membership of the neo nazi organisation/web shop European Brotherhood, which is a thing that apparently exists, I don't think you need to worry about pan-European-nationalism becoming a mass phenomenon (as opposed to separatist nationalism, which is and has always been a mass phenomenon).