OK, and how do we know the climate models are reliable? The answer is we don't, and if you keep digging, you will find that they aren't.
This is the actual problem. Credibility and education is no longer honored, but tested by people like yourselves. Quite simply, the answer to your questions, is to get a degree in atmospheric sciences. Don't dig. Learn.
At some point, it unfortunately became more desirable in our society to just repeatedly ask questions until you "stump" some authority. Somehow, this got labeled by those as being "educated" and "intelligent". The reality seems instead to be that you have no desire to understand the issue or concept, just challenge it until you can deem yourself superior.
Do you have any honest credibility for making statements like "OK, and how do we know the climate models are reliable? The answer is we don't"?
Are you well studied in how the microphysics of ice, rain, sleet, graupel, etc are handled in the climate models? How the terrain resolution and the corresponding land-use fields are interpolated and any potential effects of such? How about the sources of the snowpack fields and how often they're updated?
I'm sorry, but credible scientists can not spend their time to give you a free education when you demand it.