In the first chapter of Slaughterhouse-Five , Vonnegut mentions that he never writes a villain into his stories. This is true, however he never writes any heroes into his stories either. Vonnegut seems to take the past, the present, and the future and absolve them of any guilt, responsibility, pain, and grief. This particular reading is only one side of an argument. One could also say that Vonnegut is making a comment on society and humanity, yet distancing himself from it to create irony and also to protect his own feelings as a writer.
German planes come by and suck the bullets out of the planes and cure the dead men.
Then the American planes fly over a burning village and suck the fire up into the planes in little canisters. Then the planes land in England, the canisters are disassembled and their contents are buried underground so that they can cause no more harm. This passage quite clearly puts a beautiful spin on a tragic story. One reading of this passage could be that Vonnegut is using his new ideas about time to make one of the worst situations seem happy and good. A more accurate reading is that, Vonnegut is using some very skillful irony by contrasting the beauty of healing, protection, and peace with destruction, massacre, and war.