For starters, government has everything to do with love our nation. If we are the "most free" nation in the world (I'll let others walk that road with you), it is because our government was built to make it that way, and has remained that way through the hands of every elected official since the beginning.
Conservatives answer polls like the one you linked this way because they know they are supposed to love America. They couldn't say what they love about it. Apparently, neither can you.
So if you love America, what do you love about it? You do love it, don't you?