The man highlighted in this photo is August Landmesser, a German shipyard worker. The image of his seeming refusal to give the Nazi salute has earned him a posthumous reputation as a resistance symbol. The photo's floated around the internet with a number of captions, the most recent being "Be This Guy". I understand the statement in the context of Nazism, of course, but looked at more broadly, if everyone were "that guy", it'd be better not to be that guy.
Or...it may just be that Herr Landmesser had an embarrassing secret: