IS AMERICA’S Anglo-Protestant-African-Catholic-Indian-German-Irish-Jewish-Italian-Slavic-Asian society in danger of "Hispanicization?" The obvious answer is "no." Every major new addition to American society has been viewed in its time as a potential agent of change. And this view has been correct:  American society has continuously evolved. But "change" is not a synonym for "danger," and in no case has the essential fabric of America been endangered. Nor is it by the latest influx of mainly Mexican Hispanics.