Why is it bigotry and outdated when Europeans want to preserve national boundaries and culture?

It is right wing extremism when native Europeans want to preserve their own language, culture and identity. It is bigotry and old world thinking if they do not want to be a melting pot. Yet, the Japanese are not considered bigots and old world when they do the same. A better example is the Israelis. They understand that if they let Muslims in where they become a majority, they will simply vote out the jewish character from the state. Muslims in Europe who do not assimilate or respect european ideas and show no tolerance, if allowed to form a majority, will just vote out tolerance and european ideas. Why is it right wing for Europeans to have the same opinion about their nations future as an Israeli?