I understand what you mean, and it sucks. I've been accused of being antisemitic because I post against Israeli policy and I've never cared about ethnicity or birthplace. Sometimes because I put up a post talking about supporting Jews that oppose Netanyahu's Zionism. It doesn't matter to some folks - if you have a problem with certain people it's not because of what they do or say, it's sexism, racism, etc.

Here in Canada it's not automatically assumed men are sexist. There are folks who will say that but they are a small group. I can only imagine it's maddening to have to defend yourself constantly, especially if most people won't believe you no matter what. It kind of reminds me of an old Dave Chappelle sketch (NSFW language) about being accused of sleeping with someone and having people assume it happened.