Che isn't his name it's a nickname. I think they're using quotation in the sense of naming convention Ernesto "Che" Guevara would normally be used to denote it is a nick name and not part of his legal name.

I'm old though and reading things with continually common grammar from the last few centuries until the modern digital era has started changing things isn't a problem for me to figure out from the context it's written in unlike those people who are bothered by "scare quotes" that havent been reading things since before the internet existed