These are piffling, frivolous things, though. It is quite possible to eschew the England football or rugby team while remaining a proud Englishman. Equally, it is possible to have another national sporting allegiance for reasons of ons's ancestry and not be treasonous. Contrary to what Norman Tebbit thinks, sport is a poor indicator of true national allegiance because - well, because it's just sport.
There's a reason everyone took the pīss out of Norman Tebbit for his ludicrously narrow view of nationhood.