demons from God

In the 1830s it appears God released billions of demons into this dimension. Here are some indications:

Mormon cult started
Rapture theory started by Margaret McDonald
Night before Christmas poem written
Sodomy appears to start spreading in the following decades.
Modern "speaking in tongues" possibly starts
the population explosion was starting, which needs demons to attack the large numbers of people.

All these events needed lots of demons to help them develop into the destructive forces they have become.