What is the connection between distrusting effects that have only been observed in models, and disbelieving climate change?

Since you appear to be asking in good faith, despite this being a frankly irrationally hostile environment whenever the subject comes up, I’ll answer.

The raw data shows no warming trend. NOAA and NASA admit this, it’s not a conspiracy theory. The adjustments made that show warming are based on models. Hence to trust the warming trend you have to trust the models, which are very computer simulations.