From my time, I would say that America is a land of free thinking and tolerant people, but not the land, and sadly not the land I had wanted it to be. (Am an Arab who had long admired the USA.)
I wouldn't get into the technicality of "a land" or "the land". We all get emotional and stuff and there is nothing wrong with that but behind all that if you think quietly you will know it is "the land" of free thinking and tolerant people. I am a Muslim and I can say it from my heart that I am a better Muslim (compared to where and how I was 20 or so years ago) because I live in this country. I can practice my religion the way I want. There is no freakN social pressure. Yes I am sure there are people who don't like me because of my religion or other things. That's not the mainstream America. Those type of people exist anywhere on earth. Can you or I control that? No. So I don't worry about it. My job is to "try" to do the best in life. Seriously, I have been to many different countries and lived and grew with so many different nationals. I still say there is no place on earth I would raise my kids and call it home beside this country, the US.
My friend, you have to read the history of the world and then when you learn the American history you would be wowed by the creation of this country and it's systems. You would appreciate it more. Even an average American, in my opinion, don't fully appreciate meaning of freedom and how this country was formed. Founding of this country was a huge huge turning point for human civilization. That's a fact. Don't try to portray America with what you see on Fox or what Fox or other news org try to tell you. America is lot bigger and richer than that.
I spent 5 years in the USA and what I loved the most was to read US history. Living in DC, I joined a bunch of think-tanks and saw how vibrant the political life is. And I was an admirer of the USA because of its amazing history, just as you say.
I just think the USA can do better than it currently is, and closer to what it is capable of being. I think it lost its ideals and drifted from the honour of a republic to the tragedy of an empire. The UK of course has the legacy of a more cruel empire, and no country in the world is free of blemishes. (And the Arab world is a basket case making its own recovery.)
But I just felt so sad when comparing what I saw Americans do - amazing people, such a pleasure to be around - and what their government did in their name - locally and internationally.