Why is it that race and skin color is so important these days?

This country is so divided. Black people hate white people for being white. I understand there still mad about the slave times but its been over for damn near over a 100 years. What people did back then isn't right now. People need to stop living in the past. Plus when we went to civil war the north won so the slaves would be free. If anyone likes to learn something for once Abraham Lincoln was a republican president who wanted slavery to end. Hence is why he was killed for it.
Why is it that race and skin color is so important these days?
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