Why do you think God created many races?

Genetically isolated groups of humans independently evolved to become slightly different from each other.  Much like dogs, there is only one human species, but there are many distinctive 'breeds' or 'races' who can successfully reproduce with each other.  Races are actually an artifact of our cultural biases on human reproductive behavior, just as dog breeds are the result of humans tampering with canine reproduction.  Your imaginary God had nothing to do with it.

God created one race, the human race. The ethnic races developed because of Continental Drift, and the effects of melanin in our own bodies.

One race = human race. Different variations = enjoyable. One of the same thing would be boring. God knows what he is doing trust the process.

Why do you think God created races? 

When we look at creation, we can see that clearly Jehovah God loves variety (Romans 1:20). He filled the Earth with a wide variety of life, flying creatures, sea creatures and land creatures (Genesis 1:20-25). He filled with the Earth not just with one plant but a wide variety of plants, vegetation, trees, bushes, vines, flowers (Genesis 1:10,11). Animals exist in different shapes, sizes and colors. So too can humans.

Humans all are offspring of Adam and Eve and are capable of a wide variety of features (Genesis 3:20; Acts 17:26). We can have different shapes, sizes and colors so that each human is unique. Even “identical” twins are subtly different. With time and practice, you can learn to tell them apart.

As humans spread out around the Earth to live in different areas, those groups who lived in one region would reproduce within those groups so certain genetic traits were inherited and emphasized over time. Despite these surface differences we categorize as “races”, humans are all still one “kind” as demonstrated by people of different races are able to have children.

https://wol.jw.org/en/wol/d/r1/lp-e/1101989257

Why are we still separated?

That’s partly due to excess pride (2 Timothy 3:2-4). People have an excess love of themselves that’s often reflected in a love of people like themselves, that they are inherently superior to others—and a hatred of people different from themselves, that they are inherently inferior.

This is in opposition to God’s attitude of having no partiality; that anyone doing good is acceptable and loved by him (Acts 10:34,35). God also commands us to have love for one another (1 John 4:20,21). His son, Jesus Christ, told his followers that they should love God, each other, neighbors and even enemies (Matthew 22:37,39; 5:43,44; John 13:34).

However there is someone who stands in opposition to this who stirs up people to have excess pride, to cool off their love for their fellow human beings, to blind their minds against following God, Satan the Devil (2 Corinthians 4:4). Jesus described the level and power and influence he as being due to him being ruler of this world, but that Satan has no power of him (John 14:30; 12:31). Moreover Jesus demonstrated that Satan’s influence could be resisted and set the example for us as well (Luke 4:5-8; Matthew 4:10,11; James 4:7). Yet, the vast majority of people are not following the model Jesus left for us and succumb to the influence of the Devil (Ephesians 2:2; 1 John 5:19). You only need to see the daily news to see how divided humanity is.

Why can we hope for unity?

The good news is that it will not always be that way. Jesus foretold that world would not always be dominated by those puffed up with excessive pride but that the meek ones would inherit the Earth (Matthew 5:5). When he stated this, he was quoted from Psalms which explains how the meek ones would inherit the Earth, because those with excess pride and a lack of love would be wiped out from the Earth (Psalms 37:9-11). That would leave the Earth for meek, righteous ones who follow the model of Jesus and worship his heavenly father, Jehovah God (John 13:15; 20:17; 1 Peter 2:17). Moreover we will be able to do so when God’s will takes place on Earth, turning it into a Paradise (Matthew 6:9,10; Revelation 21:3,4). This will fulfill God’s original purpose for Earth, for it to be filled with good, happy people, taking care of the Earth all united in one family (Genesis 1:28).

https://www.jw.org/en/library/magazines/g201404/ra...

https://www.jw.org/en/library/magazines/wp20130601...

Language was confused to preserve the truth and prevent man's attempt to throw off God.

Now the truth has been manifested man may be given over to believe the lies of his inventions.

I don't think God had anything to do with it. Groupings by physical similarities are somewhat arbitrary and not really rooted in any hard scientific characteristics. They're mostly a result of outdated societal in-group favoritism.

Though, I think the Judeo-Christian explanation is that people were building a tower which would "reach unto heaven" in the wording of Genesis 11:4.  Which, seems fairly minor compared to modern projects like the ISS, but God apparently wasn't pleased with construction, and saw it necessary to confuse languages and scatter people about the earth.

At any rate, physical traits as part of our normal genetic variation, with far too much interest put on it by some with the goal of divisiveness makes a lot more sense than a supernatural being thwarting a moderately high stack of bricks.

6 The Lord said, “If as one people speaking the same language they have begun to do this, then nothing they plan to do will be impossible for them. 7 Come, let us go down and confuse their language so they will not understand each other.”

8 So the Lord scattered them from there over all the earth, and they stopped building the city. 9 That is why it was called Babel[c]—because there the Lord confused the language of the whole world. From there the Lord scattered them over the face of the whole earth. (Genesis 11:6-9)

God didn't make many races.   He made the Human race

only racists see color

In the fairy tale god created TWO people. This was a huge mistake by the fiction writers, because it cannot account for the 4 accepted races of man. Especially without evolution. 

NCWJ - Better do some more research before you embarrass yourself any further. 

God didn't create different races because God doesn't exist.

Eventually most of us humans are going to be of mixed ancestry.  It's basic evolution and reproduction, not God.