I've witnessed this kind of mislabeling on many occasions. Once I was on a forum chatting about how the reserve banks are controlling everything and also distorting culture and then some random person told me I was "anti-semitic" but I hadn't mentioned Jewish people even once. Religion hadn't even occurred to me as being a factor in my discussion. I told the person that they're the ones who are anti-Semitic for inferring that there is a connection between reserve banking and Judaism.

I've witnessed this behavior in other places and on social media. I don't know what the goal is of this false labeling.