My last boss was like this.

I loved listening to him when he brought up how his family was in WW2, his stories about his dad was a pilot in WW2 fighting Japan, and all the various battles in Europe.

Then after a few years of trust, he showed me all of the “nazi memorabilia”. On one end, I’m a color person, so he must have really trusted me. On the other, wtf. Kinda feigned interest after that and moved jobs after a year.