Why would that disturb you? Personally, I found the "game" well done but boring -although it was interesting to create "what if" scenarios-, but that is ok for it was never intended to be entertaining; it was created to help put an end to conspiracy theories. As for the action of shooting, I found it little different from playing Sniper Elite -the two are surprisingly similar, although the latter is much more fun- although I do prefer killing Nazis to shooting Presidents.