Explain how being anti-vax is more valid than being pro-trans. Ignoring the US and Western Europe, most of the world isn't on board with all the trans stuff. In both cases, you're questioning the mainstream scientific narrative.
You can being anti-pro-trans without being against it because it's against science. People who are anti-vax and anti-trans are not just saying "trust le science" they just genuinely believe in both of those things regardless.