Also maybe from a base caveman brain standpoint, it is seen as a threat of someone taking your fire away which could mean death in winter, etc. Man has tamed fire for a long time so it is a primal thing.

And base-level caveman brain goes “the fuck you are” even in sub-conscious level. And the trigger wakes more people up to the threat.

I’m not psychologist but it makes sense to me from that viewpoint.