Do you know for certain whether that man considered what affect his actions would have on others? My guess is no, you do not, you're merely speculating.

Interesting, though, that if your premise is a hero's actions never negatively impact others, do you advocate removing hero status of war veterans? Surely you can agree that whatever actions a war hero took negatively affected the loved ones of those he fought against. So either your premise is unsupportable, or there are stipulations to heroism of which I'm not aware.