Thanks. Why do so few Catholics know this "teaching of the Church?" 

Seeds of today's anti-Catholicism in the USA were surely sown by such attacks from Rome on democracy, freedom, and separation of church and state. By a future SAINT! 

Do some in the hierarchy today secretly support the anti-American views of Pope St Pius X? Are any Americans among them? 

Has anyone ever apologized for the "most pernicious error" by a pope condemning the separation of church and state in our democracy? Since there was no ambiguity in the saint's condemning of that evil "thesis,"  I don't see how it can be walked back or be misinterpreted. 

Many American soldiers, including many Catholics, have DEFENDED with their very lives a core value a sainted pontiff called "pernicious" and "false." That's a fact.   

What am I missing?  And why isn't this Church "teaching" against "Americanism"  talked about more? 
And why doesn't anyone say, "Pius X was wrong!" Maybe we should ask Judge Gorsuch if he agrees.