This is plainly not true. The USA has no conception of human rights. For instance, Americans do not even recognize human rights. Set down the Universal Declaration of Human Rights in front of them and they will sputter that most or all of them aren't human rights. This is because Americans automatically translate universal human rights into civil rights. It's a false cognate between the American language and the English language. The term 'human rights' simply doesn't exist in American.

> How do you see this coming battle between the fundamentalist segment of Islam, Humanist Europe, and the schizophrenic USA

Which battle and in what terms? Military, economic, social, legal?

> Will liberal humanist citizen be able to educate and motivate a large enough majority of voters to stem the tide?

No, absolutely not. Will humanists be able to educate the children of these people to stem the tide of barbarism? Almost certainly.