Olga, your personal preferences are your choice and if you do not find a particular person attractive and do not want to date them it's OK. However this is not what I commented on. Ask yourself the following questions:
What skin color are "мужчина из Америки"?
How tall is "мужчина из Америки"? How much does he weight?
What race are "мужчина из Америки"?
Where "мужчина из Америки" was born?
What native language "мужчина из Америки" speaks?
What religion "мужчина из Америки" associated with?
Is "мужчина из Америки" have any kind of education?
What food "мужчина из Америки" likes?
Is "мужчина из Америки" divorced? Single?
Does "мужчина из Америки" have a job? A house? A dog?
And that's why "ни в коем случае не буду строить отношения с мужчиной из Америки" is a closed minded statement. Observe, I did not call a person making a statement closed minded, just her action. A thinking person would understand that, and change her mind. The other kind will blast me on the internet for the things I did not say.