What’s the psychology behind people mass selling upon war news?

I don’t understand why someone would hear about Iran striking Israel and decide to up and sell all their crypto. I don’t get the connection.

I know people say that the crypto and stock markets mirror each other, that I get, but why would someone sitting in the west or in Asia be worrying about their crypto coins when shit starts to go down in another part of the world? Like I’d understand if it’s Israelis or Iranians or perhaps others in the Middle East doing the selling, but why is it considered to be a global thing?

ETA: going through all the responses, appreciate everyone’s input!