You simply don't know what you are talking about.
Your post in a nutshell. Your ignorance is so high that you don't really realize how laughable your claims are. You could avoid this by simply reading one or two books about this subject.
James Charles Bergquist's Daily Life in Immigrant America, 1820-1870: How the First Great Wave of Immigrants Made Their Way in America might be a good start.
Please educate yourself before you continue to make a completw fool out of yourself.
Wrong again
Look up how the Irish or Italians were treated. That they had the wrong religion (Catholics) was just the start.
there are few if any accounts of people
There were thousands of Germans alone who fled after the failure of the 1848 revolution, many of whom ended up serving in the US army and fighting in the Civil War. The monarchies in Europe in the 18th and 19th century were incredibly opressive and caused many people to flee. Those are not comparable to the kind of monarchies we have today, which are de facto parliamentary democracies with some dynastic atavism.
the typical left
I suppose anyone who does not agree with you is a Marxist?