Where do you see a contradiction here? My point regarding genetics is that just because a subset of your women would get impregnated by another haplotype neither your people nor your nation would automatically disappear. There is virtually no population on Earth that this didn't happen to repeatedly over history. It is less of a big deal than you make it out to be. Who cares if a hundred years down the road the average citizen has 5% exotic grug genes? That's not gonna be the end of you.