All of that seems correct, except WWII was actually before the Hamburg flood of 1962. Also, Germany doesn't have any Bass Pro Shops either, so there are in fact no pyramids.
The messed up part is that Facebook actively pushes this garbage. I use Meta for work/networking, and I have this stuff on my page all the time. You can't block it because there's so much. You can't report it; the Facebook reply is basically, "no, nothing wrong here. It's supposed to be like that."