Probably not. All the data points to the climate changing (the current trend appears to be moving everything towards the extreme).
What's causing it? Well, that's where a small amount of bollocks rears its head because the climate is a rather complex thing and even if it very simple, it's a massive feedback system as chaos theory has a few things to say about it (i.e. it's not accurately predictable as it is sensitive to initial conditions).
So is it all/mostly natural? Possibly, at least in part (e.g. volcanoes, sun cycle etc)
Is it all/mostly man-made? Possibly.
Is the consequence off getting it wrong a "Bad Thing"(tm)? Absolutely!
So which gamble do we take? Carry on as now and run the risk of committing species suicide; or tighten our belts slightly, stop being total dicks, and try to tread as softly as possible? If the major portion is natural, our measures will have little effect; but if we ARE the major cause (which seems likely) then we might just yank our collective asses out of the fire.
Sitting around and doing sweet F.A. is not really an answer.