Self-Proclaimed Animal Rights Activists

It is interesting that the word “animal rights activist” is associated with the attribute “self-proclaimed” in most cases. Anyone who has a little sense of language can understand that this is meant to be pejorative, discriminatory and disrespectful. But what exactly is so disparaging about the attribute “self-proclaimed”? That is probably related to our common notions of expertise. Only someone who has learned something is allowed to call himself an expert. Everyone else gives themselves a title without having a clue of what they are doing. This term is often used by farmers and hunters or others who either earn money from animal suffering or have fun with it.