Yes and no.

True Division would mean the prevention of procreation between groups.

A cat cannot produce offspring with a monkey by nature. This means God intended these species to be on their own.

An Indian man can bare offspring with a Mexican Woman perfectly fine.

Two men cannot bear offspring which tells us that God says this is a no-no.

God created Division at the beginning to DECENTRALIZE power structures. It has been proven that people will naturally form a pyramid structure of leadership to get things done.

To prevent dictatorship at the beginning.

A man cannot easily rule another man if they cannot understand each other's language.

God created separate nations UNTIL enough diversity of IDEAS and CULTURES was available to the human race.

God knew at some point the human race would mature enough to create things like Airplanes.

This means that keeping nations separate over time would automatically dissolve on its own. This is due to the human race advancing enough to move around.

God knew that by the time humans became innovative enough to build things like planes.

1000s of years of decentralized ideas would be molded into history.

Your mindset of "Nations of supposed to keep to their own" is not sustainable over time.

Are you suggesting that 1,000,000 years from now? Humans are still in the same land practicing the same form of culture.

That's none sense.