Armed Polite Society

Just now took the thermo out to get window readings. One showed 264F, and once I got it lined up (difficult without going blind) I hit 381F. This was at 845PM.

If there's Biblical backing for a particular tradition then maybe it's worth getting wound up about.  If there isn't, at minimum it probably isn't important enough to get real invested in from a religious standpoint.  Even if it is a family tradition that you enjoy.

Isn't there at least equal incentive on to prove that long-held and beloved traditions associated with Christianity are valid regardless of the facts?

Maybe. But the point is a lot of people have an incentive to make these things out to be pagan, and they're on both the skeptical and the believing side. So you have to choose your sources carefully. Additionally, the vast majority of people aren't going to read a bunch of obscure, ancient writers (or even recent historians) to know who Mithras was, or how eggs were (or were not) used in pagan worship, so most people are getting these things 2nd or 3rd hand.

From the comments:

I've been a roofer 36 years. I've found people living in these signs on roofs more than once.

I could see that. They're enclosed, secluded, have electricity, and even the old, fluorescent lights last long enough you could go a long time without anyone thinking to look inside.

Again, single flat double pane window and more - much more - heat than direct sunlight.

A simple flat reflector won't focus light.

Reflections from the windows burned people at a pool at the Vdara hotel, a high-rise in Las Vegas.

The wall of windows at the Vdara hotel is not flat. Overlapping reflections from MANY windows concentrate sunlight.

The windows on a London skyscraper were blamed for melting part of a Jaguar XJ.

The wall of windows at the London skyscraper is not flat. Overlapping reflections from MANY windows concentrate sunlight.

The things you learn from wikipedia

Did you know ...
... that women were 33 percent more likely than men to search for clown pornography in 2016?

I could have lived without knowing that even existed