It’s not clear (to me) from reading the article whether the pool is recent, of if it has been there for 40 years, but it seems to me to be the latter case.
But I think that if it has been there for 40 years, it seems innocent enough. The guy likes guns. And IIRC, Libarace (who really liked pianos) had a piano shaped pool. It was the eighties… *shrug
However if it was recently commissioned, given the current political climate, well… that hits a little differently.
