Actually, a lot of the blame is on the former colonies emulating the secular French Revolution in the 19th century, just as much of Europe did. They followed along with the socialist and communist mutations in the 20th and 21st centuries.
So you submit that if the French had held fast to Catholicism the socialist evolution of the New World would have been prevented or at least slowed?
Granted, Napoleon had a hold on the European nations with colonies accross the earth,yet did he really promulgate the ideals of the Revolution he pretty much usurped?
He was, like Obama, a tyrant first and an ideologue second.