We must learn to treat the demagogue and aspirant dictator in our midst just as we should treat our external enemies in a cold war - with the weapon of ridicule. The demagogue himself is almost incapable of humour of any sort, and if we treat him with humour, he will begin to collapse. Humour is, after all, related to a sense of perspective. A.M. Merloo, M.D., The Rape of The Mind, 1953
Every so often on Twitter when a politician does something stupid and everyone is mocking them someone will try to be superior and start lecturing how attention should be put towards some other cause.
For example, when Trump attacked Chrissy Teigan I saw numerous verified Twitter accounts saying how people should be tweeting about something else. First of all, tweets aren't a limited quantity, it is possible to tweet about multiple topics at the same time.
Second, laughing at leaders is important as dictators can't handle humor. Being mocked and laughed at is something they fear and by making jokes at them it reduces some of their power.
Finally, there is a lot of stress out there, it is okay to lighten up and joke around at times.