I am not claiming that all of the warming over that last 150 has been 100 % natural. Even the Anti Christ of Skeptics himself, Richard Lindzen, doesn't claim that. Of course climate change is real. The questions we need to be addressing do not have simple yes or  no answers. The questions are more about degree, what can we realistically do about it and where are our limited resources best spent given that there are arguably many more immediate environmental and social challenges facing us today.  
But your comment does illustrate how successfully the supporters of the AGW paradigm have cultivated and promoted the pejorative term "denier" to ridicule and denigrate anyone who dares to be skeptical of the conclusion that almost 100 % of the recent warming trend is due to anthropogenic CO2 (your comment "half-baked well poisoning potshots at personal credibility" comes to mind here).