Thanks to media hype and the general inability for most people to properly understand complicated science they are not particularly interested in, there is a commonly held misconception that ALL warming since the industrial revolution was caused by humans [...]
This is perhaps the most galling tactic of climate changing deniers. It's akin to arguing that because not all lung cancer is caused by tobacco use, nothing should be done about cigarettes.
To be fair, sometimes those who accept the fact that anthropogenic warming is real and significant don't always take into account the economics of what should be done in response, but at this point to argue that we should do nothing to curb anthropogenic warming because the science is inconclusive is ridiculous and short-sighted.