How to Talk to Science Deniers?

How to talk to science deniers: 'You have to approach them with an attitude of calm and ampathy' And if you express that, it will make them like you. Building trust is crucial for convincing somebody to give up their denialist beliefs. I went to a flat earth convention one time simply by liste i think i built trust. People can only monologue for so long, and then they'll saywa, what do you think?