Protestant is spreaded all over the European Union in the 16-17th centuries and America since the 18th century. It was because of corrupted monks and clerks because they believed there were errors in the Catholic church, and some of the Catholic leaders in The Papal State started to believe these were valid so they started the counter-reformation, some countries reformed, others stayed.
Most of America and the UK is Protestant and some don't believe it exists. The US Slaves were like the Irish, they were meant to be treated harshly because they were slaves, both sides wanted power, they wanted expansion. The USA sought expansion in the west and slaughtered many native Indian people. The slavery made the USA become richer and Napoleons decision of the Louisiana purchase.
I'm not sure why you're so against the Europeans, you essentially came from Britions, we came from Germanic Tribes such as Saxony. Without the superior technology from the Europeans back in the day, your nation would of never become so advanced. Idc if you're pro American or not but clearly you don't know much about history.