For over 200 years leaders of the US have been Protestant Presidents.
Your argument falls flat.
An Eastern U.S. that had been colonized by a Catholic power like Spain wouldn’t have been a bad thing.
The faith of America is commerce. If if weren’t for Pope John Paul II and Catholics like Joe McCarthy, Communism wouldn’t have been taken too seriously.
Even Ronald Reagan had strong Catholic influences.
http://www.catholiceducation.org/articles/catholic_stories/cs0080.html
Most of the East Coast historic Protestant Churches coddle the Soviets.
Pope Leo XIII sounded a warning about socialism 30 years before Lenin appeared on the scene.
I might add that Protestantism helped to give birth to Freemasonry, which gave birth to atheism.
I might add that Communism was founded by Protestants. Karl Marx was a Protestant.