The truest answer to violence is love. The truest answer to death is life. The only prevention for violence is for the heart to have no violence within it. We cannot prevent evil through any system devised by mankind. But we can grapple with evil and defeat it, but only with love—real love.
Yes, Halloween is actually a religious holiday. The pagans call it Samhain, the Christians used to call it All Hallow's Eve. In Mexico, it is the Day of the Dead.
It's a spook holiday! Spirits, spooks, the thinning of the veil between types of reality. That's why all the emphasis on witches, ghosts, and skeletons.