I agree with your first, but disagree on 2 and 4.
I was a strong believer of global warming, but the evidences made me more and more unsure of that, especially after the CRU scandal, it seems more about money then others.
This "scandal" was greatly exaggerated and taken out of context. Besides even if it did show unscrupulous behavior among a minority of climate scientists (which it didn't) that does not change the science and the facts.
Science is never about majorities, it is about truth.
I disagree. In science majority does equal truth. One person or a group proposes a hypothesis, tests it, publishes the results, and based on the hundreds or thousands of peer reviews and recreations of the experiments, a consensus is reach on whether it is a plausible explanation for a phenomenon.
The current blame of CO2 on global warming are pushing us onto something much more dangers, i.e. the mercury filled lights replaced older incandescent lights, some guys suggest capture the CO2 in air and store them in cans..... There are way too many unanswered questions, and most of the global warming predictions failed so far (hocky stick anyone?).
I agree that there are a lot of unanswered questions and far-fetched ideas about climate change, but most of it is attributable to the unchartered territory we are entering and the uncertainty of how to deal with it.
We should be responsible to our own environment, but for me, we should focus more on not let industries pollute us with heavy metals, water sources, nuclear waste, which are very hard to reverse, and less on CO2. It is much easier to get a global cooling than warming, as the big volcano erupt in the 1800s put the earth into a small ice age with all that CO2.