>No, you are not going to get arrested in America for making a joke about George Washington.

If someone leaks you joking about repeating a historical terrorist attack the chances that the police at least pay you a visit is very high, in the United States and other Western countries.

There's actually a whole array of news articles you can find on your search engine of choice about arrests after people made social media posts about threatening politicians. Which I might add, joke or not is very reasonable.