It's often possible to get through to people who are initially hostile

If there is a hint of the person actually reading your messages, then yeah, I'd agree in many cases. But read the messages this person posted, it is clear after just a couple of messages that they're not responding to anything @GrapheneOS actually wrote, they're spewing nonsense into the ether.

Personally, I don't think it's worth trying to save everybody, focus on people who are actually willing to listen, and have a conversation instead.