Huh? Everyone is sexist. That's the whole idea of sexism. Just like everyone is covered in germs and potentially spreads disease. Just like proactive action is required in order not to spread disease, proactive action is required in order not to spread sexism. When we point out people (or, more commonly, actions or policies) as "sexist", we mean that they either choose not to take that proactive action, or worse, choose to take action to increase sexism. So yeah, of course you're a sexist, and so am I.