Being kind and respectful may or may not help. It depends on what the cultural conflict is based on. Being rude and insulting will not help at all! It's hard to give you any ideas when I don't know the facts. Like why do you think the parents hate you? Has their son given up his family traditions or religion for you? Are they in America by choice or would they rather be back in their home country? If they rally HATE you there must be more to it than your nationality and religion. My experience is that Russians usually like Americans and are happy for their child to marry one.