This page and this page (click on the links for more details on their views and some of counter-criticisms by other scientists of them) are a good indication of the scientific support behind some models of global warming.
If you look at the scientific consensus in the above (or the scientific majority perhaps as some might say) most people who study climate and related specialties with global warming agree that anthropogenic global warming is the most likely cause for recent warming (there's tons of links in there). Common criticisms like "well we've had record lows in the world, global warming doesn't exist!" are so of misrepresentations of an actual model of global warming. Though they differ, most share the idea that global warming leads to more extreme weather especially in-land (where record lows of cold have been recorded), and they also predict harsher summers and more powerful storms.Everyone who has studied weather with any amount of comprehension understands that the climate naturally goes through cycles of heating and cooling this is not new.
To me it seems like you focus more on the sensationalism and hysteria generated by some media who take advantage of global warming as opposed to the scientific fact supporting the global warming hypothesis. Most scientists who are in fields studying global warming are estranged from media and many of them have misgivings about some of the things being wrongfully said by so-called global warming "aid" organizations or news networks (largely playing off a chance at more money as opposed to making and dissemenating useful, truthful knowledge).