Yes Faith, you got the history just right. Just like in 11th century the first xians came to my country on a crusade erasing native religion is a fact.
Using xian history to prove just about anything is disingenious at best - during the dark ages you basically had two choices, pretend to be a religious scientist and continue with your work or die in the hands of compassionate Christians.
There is a strong correlation ( I'm not claiming causation) between the lessening influence of religion and prosperity of a nation. As an example I present all Nordic countries.