That all depends what a union is about to you. To me, it is totally on-topic.
Having a lawyer helps, because it helps you fight these attacks. But larger than that, changing the situation, the society, the relationships so that you do not undergo any oppression based on your situation.
The goal, to me again, is to live in a more communal, solidarity-based environment. Telling about the genocide happening in Palestine because of their ethnicity, destroyed by their colonizer neighbor, and supporting them is totally on-topic.