It’s sad and dangerous how easy it is (for everyone) to misunderstand a slogan and react defensively. When a belief is condensed to a few words, it necessarily assumes a whole set of contexts, contexts a reader of that slogan may misunderstand. There are examples of brilliant writing where tremendous nuance has been conveyed in only three words; they are exceedingly rare.
Three-word slogans put into hashtags seem to clarify and encapsulate meaning to their authors, and to the people who already share the beliefs and even prejudices of the person who used the slogan. They also seem to clarify and encapsulate entirely different messages to people with other sets of assumptions. When that person responds with another slogan it is difficult to prevent a shouting match.