The heading is click bait.
I responded to a Brit Hume tweet, later deleted, about how liberals don't love America. I'll expand it a bit here:
IMO most liberals, like me, aren't terribly proud of America's past. We tend to see the dark side, and there is a dark side: the ruin of Native American tribes, slavery, imperial misadventures, etc.
But most liberals, again like me, love America for its future, believing that the "arc of the moral universe is long, but it bends towards justice"; the future will redeem the past. For the Christians among us it's a postmillennial vision, the idea that if Christians do Christ's work on earth, the world will get better and better, leading up to the eventual return of Christ. (I'm channeling what I think were the beliefs of my minister grandfather and missionary aunt.)
On the other side, conservatives see America as having been a model for the world, the establishment of the government under the Constitution as being the great event in world history. So they love America for its past, but are concerned about its future, as liberals thoughtlessly destroy the fabric of society which accounted for its greatness.