The sun is the main energy source affecting our temperatures, I'm not disputing that.
What you're denying is that it's necessary to consider several other factors (including greenhouse gases, reflectivity of the surface, earth's orbit, and the tilt of earth's axis) to predict what the temperature will be. Two of those we actually have some small influence on, and for at least one of those two we have a measurable impact.
I'm not one of those alarmists screaming that we're going to wipe out civilization within the next generation, but at the same time anyone who claims we can't have any effect is just burying their head in the sand.
