Why the United States only? Anyway, these online petitions are nothing more than feel-good measures. They have very little practical value.
As I'm sure you know, racism has been around since biblical times. Sadly, it's part of human nature.
True - and racism/ethnicism is FAR from unique to the United States; if anything, the EU (and even the Middle East) are worse. (Look at how the Assads in Syria, and Saddam Hussein in Iraq, got into power in the first place - and largely how they kept it; and Quaddafi in Libya was no better.) As much as criticizing the United States is seen as *cool*, at least the United States generally makes an honest effort to enshrine equality in the law for all races and ethnic backgrounds, though they could do better - as *bad* as our effort is, it's still better than that most anywhere else.
No - I am not defending the effort of the United States absolutely - notice that I said it could be better. I am simply saying that outside critics of the United States on those grounds should take a better look at their own country's practices before criticizing those of the United States. You may well find us the *cleanest shirt* in the hamper there as well - and I take no pleasure at all in it.