Answer:
.
Step-by-step explanation:
It is most often due to the history the symbol in question carries. That is to say, if in the past that symbol was used to label specific members of society in a way that dehumanized them, people from that same group can feel like they are being attacked by the person using that hate symbol today. A perfect example would be the use of a swastika, which is associated with Nazis who persecuted the Jewish population of Germany and other countries in World War II.