Not the first time ever, obviously. Immigrants came and spread Christianity.
These nutters have always just been nutters. I can imagine back in the day...
"Damn immigrants, coming over here, not adapting to our culture. Spreading Christianity. I hear there are schools in Londinium that are completely Angles children, not a Saxon in sight. This is the woke agenda! Keep us all mixing until our identity disappears,and we lose our Pagan values!"
- Nigus Faragus 400 AD