That's right this hero risked his life to get involved, he decided what was worth risking his life over. Now if the cops came would you blast them for risking their lives over that pocketbook, of course you wouldn't you would be praising them for putting themselves in harms way. Double standards lives (especially with the haters)!
I doubt this guy cared about a pocketbook anyways, he probably was sick of seeing victims, he knew he had the means to stop the criminals and he decided to do so and successfully did it. To that lady and those who were there they consider him a hero, anyone who would be in that same scenario would consider him one as well.