A Patriotic Task for Goalkeepers

Footballers campaign against racism. They're now all wearing "Black Lives Matter" on the back of their shirts. The worst racism is having porous borders. Which must ineluctably lead to the end of the British race. Except that there's no such thing as the British race. Border controls relate to people with other nationalities. So wanting strict (but fair) border controls is Nationalism. Or, since it is defensive, it can be described as Patriotism. So why don't footballers campaign against Britain's porous borders?