No, General Pershing did not dip 50 bullets in pig’s blood and shoot 49 Muslims and let the 50th go to spread the word to his cohorts. It’s one of those internet myths spread by the likes of your crazy uncle who also believes that jet contrails are evil and that they faked the moon landing. But Trump keeps telling the story as if it was true.
It would be a lot better if he was the myth; the scary story we tell around the campfire or the internet meme we spread to warn the nation about what could happen if we let a dangerous egomaniac loose upon the land.