I AM NOT DEFENDING GUIDOS IN ANYWAY...but
Strictly along with your claim about natural selection, i believe that the majority of NS users would die off before the guidos.
lets break this down with some support info.
Guidos are all douchebag meat heads who love to fight, so natural selection would probably put them over most of us in the whole fighting part of that.
secondly, whether you like it or not, they get girls, i live in NY and hate these dudes with a passion but they always leave with fine ass girls. So they would reproduce more than we would, filling the world with more faggot ass guidos.
What we need to do, is stop them were it starts, the girls. We need to brainwash women into not being attracted to these very metro and douchebag men.