I've learned that you can't convince some people. For me I go there to educate about transit use now to them, I view it more as community outreach than social media lol. Some will just regurgitate fox news at you.
Others, though, and I'll say the majority even, are misinformed and haven't heard the other side before. They are genuinely curious, there may be an initial comment or two of regurgitation but I've found that patience and kindness is something they don't expect, and they'll open up once they realize you aren't there to argue.
Usually I start with the Socrates method, just ask why they think that. Usually more regurgitation, maybe with some random stuff that has nothing to do with the original point. So I ask a more targeted why, and that's when we start actually having a dialog. Usually I won't get them to change their mind, but just learning that they can have an open conversation with a demmycrat will change their views a bit. They're so entrenched in their echo chamber they don't know who we are
Then there are people who are just genuinely asking questions, which I'll jump on before some hate monger does. Things like "I'd try transit but idk how it's so confusing". I'll sit with them and explain how things work and how they might try it the first time