What does "I want my country back" mean?

See this article. This is exactly what they want, and they're going to get it with Twamp and the GOP. An excerpt:

"So, when I hear someone say that they want to take their country back, I cannot help but look at the person making that statement and wonder, which country do they want? The one that used police to bust up unions? The one that made lynchings a celebratory outing? The one that preached a woman should be happy staying home, raising the kids and catering to her husband's every whim? The one where homosexuals hid their sexual orientation from all but their closest confidantes out of fear their careers and lives would be destroyed, and that they would be disowned by their families? The one where black people could not eat in the same restaurants at which white people ate, or drink from the same water fountains, or attend the same schools or live in the same neighborhoods."