The Tower of Babel wasn't a mandate to never mix with anyone. The issue was them challenging God, not mixing itself.
There are times when mixing happens and it isn't a challenge the Holy Spirit can't overcome. Though it can have bad effects on national unity, no doubt. But nations also have a lifespan. Even the map of Europe today isn't the same map as 100 years ago, let alone 300 years ago.
That doesn't mean a bloodline is sacred.
The Tower of Babel wasn't a mandate to never mix with anyone. The issue was them challenging God, not mixing itself.
There are times when mixing happens and it isn't a challenge the Holy Spirit can't overcome. Though it can have bad effects on national unity, no doubt. But nations also have a lifespan. Even the map of Europe today isn't the same map as 100 years ago, let alone 300 years ago.