All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad is His slave and Messenger.
There is no race or country that does not have both good/bad-mannered people. To make generalizations based on certain situations is not fair. What is obligatory is that a Muslim does not wrong anyone in his dealings.
As regards the natural love and inclination, a Muslim is not obliged to love the people of a particular country and he is not sinful if he does not love them.
What is obligatory in Islam is to achieve an Islamic love; meaning that a Muslim loves his fellow Muslim according to the extent of the latter's faith and righteousness, and that he hates a non-Muslim according to the extent of his disbelief and disobedience.
Allaah Knows best.