1) easy, CO2 is a pretty shitty greenhouse gas water is much more important.
Water is indeed a very good greenhouse gas. It also condenses out of the atmosphere, in the form of rain. Carbon dioxide does not. As a result, the amount of carbon dioxide in the atmosphere has a long-term effect. The amount of water vapor in the atmosphere, on the other hand, goes in and out of the atmosphere on a short time scale, driven primarily by the temperature-- warmer air holds more water than cold air.
The infrared absorption of carbon dioxide is measured, by the way. It's not something made up.
2) we've been coming out of an ice age for 10,000 years,
Correct-- or, more correct, we are out of the ice age.
that this remains unexplained
Fifty years ago it was unexplained. It's pretty well understood now.
leaves any "blame the humans" nonsense as laughable.
The fact that there causes of climate variation other than human input does not imply that human input doesn't also have an effect. As was pointed out, the effect is small, about 0.7C so far. But it is real.
3) no, you dont, see one and 2
The theory matches the data. If you have another theory, you have to both explain why the theory based on actual measured facts, like the absortion of infrared by carbon dioxide, isn't true, and you also have to explain why we see rising temperature anyway
like the sea rising... panicing about a few mm when in many places it changes on a meter scale every day.
Huh? I'm not panicking. I do, however, believe that it is important to not dismiss the science because you don't like the conclusions.
4) Warming is much better than cooling.
I agree. That is, however, no reason to dismiss the science.