Common sense tells us that plans are made based on known circumstances.  Common sense tells those capable of reason that the absence of one item means not that the event wouldn't have happened at all, but that it would have happened in a different manner.  Can you say that the murderer wouldn't have intentionally crashed one of his planes into the crowd to achieve his ends if the bump stock had never been available? Your post is the antithesis of common sense and a shining example of emotion silencing reason.