You are very wrong. If you love someone will you be telling him that he is perfect, sinless and above all humanity? No, you will do it either if you are stupid or if you hate him.
Americans have exactly the same nature as the rest of mankind. They are neither less sinful nor more. Both national and individual exceptionalism is a serious error. If not restrained it will lead to the fall.
Only God is good and perfect.
We have overcome our European legacy of religious persecution and slavery.
Europe did not? Where in Europe are slavery or persecution to be found today?
Do you have a problem with comprehension? America was a colony. Slavery and religious persecution existed before American became an independent country. We did not invent slavery, we inherited it.
Religious persecution is alive and well in Kosovo and Northern Ireland, just to name two places in Europe where religion is the basis for strife. Muslims do not feel welcome in Europe and they have been responsible for many acts of viomence ranging from Malmo to Amsterdam to Paris to Berlin.