Al Gore declared that the science is decided on global warming, and that the time for debate is over. Skeptics think that it is antithetical to the idea of science being a search for truth for it to ever be declared that debate to be over. And for this the skeptical community takes abuse from the closed-minded, with the closed-minded even going so far, as in the example in the video linked below, as to inflict physical violence on skeptics searching for truth:
http://www.youtube.com/watch?v=ZOo6aHSY8hU
http://www.youtube.com/watch?v=ZOo6aHSY8hU