I think, speaking broadly, she was stating this is the country of all races. Expressing it was no longer the country as it was founded, all white. Nor is it the country that existed after black slaves were free and became legal citizens. The U.S. has become a country that has all races, religions, cultures and credos.
At least that’s how I see it.
She just spoke in a poorly worded manner. And this isn’t the only time she has done so as I’m sure you’ve seen in her numerous crap speeches.
I think she needs to practice her speeches because she really sucks speaking on the fly and as a result it is easy to misinterpret her words.