It's slightly crazy worrying about 'America's human rights violations' when quite a few of the UN countries that complain about 'them' tend to be ten times worse... Seriously just look at who is on the council of human rights, such 'shining' examples such as China, Libya, Iran, Venezuela just to name a few examples... It's usually these groups that are the loudest at pointing fingers at America. These are the nations with the highest number of violations.
Sure America has room to grow (there are quite a few directions that should be fixed, how 'depends on one's perspective I guess'), I'd argue few countries are 100% perfect (probably closer to none), but it's certainly better than many places in the world. Be glad room to improve can actually exist there, it's largely still one of the most free societies on earth, giving a voice to most people (protests and speech are protected rights).
I have to say I'm proud to be an American and for ideals for which the constitution stands for, and that I try to live up to, to the best of my ability. I realize that individuals do not always go about representing those ideals in a proper manner sometimes. But they don't represent me, I represent myself. If people choose to ignore my representation, then that's a problem they will have to deal with...